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Astronomy and Planetary Science Thread
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Rhinocrates
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The system sounds like a music box if you run the video.
www.dlr.de
Six planets in resonance in the constellation 'Coma Berenices'
Most people associate octaves, fifths and fourths with harmonic sounds whose frequencies are in a well-defined, whole-number ratio – 2:1 for the octave, 3:2 for the fifth and 4:3 for the fourth.
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Venus has almost no water. A new study may reveal why
Billions of years ago, Venus may have harbored as much water as Earth. Today, almost all of it has disappeared. A new study may help to explain why.
www.eurekalert.org
Unfortunately the link to the related paper doesn’t work.
Rhinocrates
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Hungry white dwarf stars eat heavy metals
White dwarfs, the remnants of stars like our Sun but only about the size of Earth, make up 97% of our galaxy's stars.
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NASA’s Webb Hints at Possible Atmosphere Surrounding Rocky Exoplanet - NASA Science
Researchers using NASA’s James Webb Space Telescope may have detected atmospheric gases surrounding 55 Cancri e, a hot rocky exoplanet 41 light-years from Earth. This is the best evidence to date for the existence of any rocky planet atmosphere outside our solar system. Renyu Hu from NASA’s Jet...
science.nasa.gov
Related paper:
A secondary atmosphere on the rocky Exoplanet 55 Cancri e - Nature
Characterizing rocky exoplanets is a central endeavor of astronomy, and yet the search for atmospheres on rocky exoplanets has hitherto resulted in either tight upper limits on the atmospheric mass1–3 or inconclusive results4–6. The 1.95-REarth and 8.8-MEarth planet 55 Cnc e, with a...
www.nature.com
FighterJock
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If true Flyaway this will quite possibly be the discovery of the century so far. Next step try to find out if 55 Cancri e has any prospects of alien life on the surface and to see how much Oxygen and Nitrogen the atmosphere has.
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As the article says absolutely no chance of life as rocky is a poor choice of words as the surface is probably a molten sea of magma.
FighterJock
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A shame that it is made of a molten sea of magma.
Rhinocrates
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After Ingenuity, presentations at the 2024 Transformative Vertical Flight conference devoted to helicopter research.
www.scientificamerican.com
You may hit a paywall, so...
Ingenuity’s achievements have sparked something of a renaissance in helicopter science, and NASA has developed lists of specifications for several more planetary helicopters, most of which will never be built. But each new configuration helps NASA to learn and iterate, with the hope of identifying the best possible designs for a range of challenging conditions.
The most developed plans include Dragonfly, which recently received the green light to head for Saturn’s largest moon, and the Sample Recovery Helicopter (SRH), which faces an unclear future as a potential part of the space agency’s troubled Mars Sample Return (MSR) program. Other possibilities include a few concept helicopters—for instance, the Mars Science Helicopter, which wouldn’t need a rover or lander as a “mothership,” and the Planetary Telemetric Helicopter for Investigation and Analysis (PYTHIA), designed to travel down the Red Planet’s giant lava tubes.
[...]
On a more mundane but equally important note, Warmbrodt says the Ingenuity team was elated to confirm that consumer electronics could handle interplanetary exploration. Ingenuity’s brains came from the equivalent of a simple mobile phone processor, which was able to withstand the extremes of a rocket launch and a Mars landing, as well the low pressure and variable temperatures of the alien world’s surface—a fact that came up a few times during talks at the conference.Previously, NASA had only used custom hardware which required costly testing to prove spaceworthiness. The ability to use commercially available components, Warmbrodt says, would provide a huge cost benefit in future designs.
[...]
At the moment, NASA’s Science Mission Directorate has updated the MSR [Mars Sample Return] design specifications in a way that “does not allow accommodation of helicopters.” It also included a back door, however, that would allow NASA to potentially squeeze in a helicopter “for added risk reduction,” albeit with a tighter budget. The answer to the question of when helicopters will once again fly through Mars’s not-so-friendly skies is up in the air.
[Some stuff about Dragonfly - nothing specifically new in this article]
Proposed Mars Science Helicopter:
science.nasa.gov
In late 2023 Grip left the Ingenuity program to become chief engineer for the Mars Science Helicopter (MSH). He said the design for the MSH hasn’t been completely settled yet, but it is likely to be the first Mars-bound mission to abandon the stacked rotor blade configuration and instead use a hexacopter design that will space six rotor blades around the craft’s body. Standing a little more than four feet tall and weighing just five pounds, it will also be larger and heavier than Ingenuity and able to carry a gross weight of around 68 pounds, including about 18 pounds of payload.
“The best way to think about it is that it’s one concept that has received a fair bit of attention and study over several years,” Grip says, “but it’s not an approved mission.”
Another promising concept is PYTHIA, designed to navigate Mars’s caves. In the past, active volcanoes on Mars pushed hot lava to the surface via tunnels. After the volcanoes cooled, the tunnels hardened into large lava tubes.
At the conference, a NASA team presented PYTHIA’s proposed design of a smaller drone body with four rotors and eight blades. A prospective landing site has already been selected: Arsia Mons, Mars’s third-highest point of elevation, at around 38,000 feet. Thanks to Ingenuity’s flight data, engineers know the extremely low air pressure that PYTHIA will face and have modeled how to compensate so it can navigate such heights.
NASA’s Plans for Next-Generation Mars Helicopters Are Up in the Air
After the spectacular success of the first-ever “Marscopter,” mission planners have soaring ambitions for follow-up flying machines
You may hit a paywall, so...
Ingenuity’s achievements have sparked something of a renaissance in helicopter science, and NASA has developed lists of specifications for several more planetary helicopters, most of which will never be built. But each new configuration helps NASA to learn and iterate, with the hope of identifying the best possible designs for a range of challenging conditions.
The most developed plans include Dragonfly, which recently received the green light to head for Saturn’s largest moon, and the Sample Recovery Helicopter (SRH), which faces an unclear future as a potential part of the space agency’s troubled Mars Sample Return (MSR) program. Other possibilities include a few concept helicopters—for instance, the Mars Science Helicopter, which wouldn’t need a rover or lander as a “mothership,” and the Planetary Telemetric Helicopter for Investigation and Analysis (PYTHIA), designed to travel down the Red Planet’s giant lava tubes.
[...]
On a more mundane but equally important note, Warmbrodt says the Ingenuity team was elated to confirm that consumer electronics could handle interplanetary exploration. Ingenuity’s brains came from the equivalent of a simple mobile phone processor, which was able to withstand the extremes of a rocket launch and a Mars landing, as well the low pressure and variable temperatures of the alien world’s surface—a fact that came up a few times during talks at the conference.Previously, NASA had only used custom hardware which required costly testing to prove spaceworthiness. The ability to use commercially available components, Warmbrodt says, would provide a huge cost benefit in future designs.
[...]
At the moment, NASA’s Science Mission Directorate has updated the MSR [Mars Sample Return] design specifications in a way that “does not allow accommodation of helicopters.” It also included a back door, however, that would allow NASA to potentially squeeze in a helicopter “for added risk reduction,” albeit with a tighter budget. The answer to the question of when helicopters will once again fly through Mars’s not-so-friendly skies is up in the air.
[Some stuff about Dragonfly - nothing specifically new in this article]
Proposed Mars Science Helicopter:
Model of Proposed Mars Science Helicopter - NASA Science
A model of NASA’s Mars Science Helicopter concept is shown in this photo.
science.nasa.gov
In late 2023 Grip left the Ingenuity program to become chief engineer for the Mars Science Helicopter (MSH). He said the design for the MSH hasn’t been completely settled yet, but it is likely to be the first Mars-bound mission to abandon the stacked rotor blade configuration and instead use a hexacopter design that will space six rotor blades around the craft’s body. Standing a little more than four feet tall and weighing just five pounds, it will also be larger and heavier than Ingenuity and able to carry a gross weight of around 68 pounds, including about 18 pounds of payload.
“The best way to think about it is that it’s one concept that has received a fair bit of attention and study over several years,” Grip says, “but it’s not an approved mission.”
Another promising concept is PYTHIA, designed to navigate Mars’s caves. In the past, active volcanoes on Mars pushed hot lava to the surface via tunnels. After the volcanoes cooled, the tunnels hardened into large lava tubes.
At the conference, a NASA team presented PYTHIA’s proposed design of a smaller drone body with four rotors and eight blades. A prospective landing site has already been selected: Arsia Mons, Mars’s third-highest point of elevation, at around 38,000 feet. Thanks to Ingenuity’s flight data, engineers know the extremely low air pressure that PYTHIA will face and have modeled how to compensate so it can navigate such heights.
That settles it.The system sounds like a music box if you run the video.
Six planets in resonance in the constellation 'Coma Berenices'
Most people associate octaves, fifths and fourths with harmonic sounds whose frequencies are in a well-defined, whole-number ratio – 2:1 for the octave, 3:2 for the fifth and 4:3 for the fourth.
God is Kevin Braheny Fortune.
Physics AI and math
Scientists use generative AI to answer complex questions in physics
When water freezes, it transitions from a liquid phase to a solid phase, resulting in a drastic change in properties like density and volume. Phase transitions in water are so common most of us probably don't even think about them, but phase transitions in novel materials or complex physical...
New method of wavefunction matching helps solve quantum many-body problems
Strongly interacting systems play an important role in quantum physics and quantum chemistry. Stochastic methods such as Monte Carlo simulations are a proven method for investigating such systems. However, these methods reach their limits when so-called sign oscillations occur.
Researchers call for a new measurement of time for tunneling particles
In an amazing phenomenon of quantum physics known as tunneling, particles appear to move faster than the speed of light. However, physicists from Darmstadt believe that the time it takes for particles to tunnel has been measured incorrectly. They propose a new method to stop the speed of quantum...
A new family of beautiful-charming tetraquarks: Study illuminates a new horizon within quantum chromodynamics
Exploring the complex domain of subatomic particles, researchers at the The Institute of Mathematical Science (IMSc) and the Tata Institute of Fundamental Research (TIFR) have recently published a novel finding in the journal Physical Review Letters. Their study illuminates a new horizon within...
Using AI to speed up and improve the most computationally-intensive aspects of plasma physics in fusion
The intricate dance of atoms fusing and releasing energy has fascinated scientists for decades. Now, human ingenuity and artificial intelligence are coming together at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) to solve one of humankind's most pressing...
Researchers create complex quantum graph states with photons
The entanglement of quantum systems is the foundation of all quantum information technologies. Complex forms of entanglement between several quantum bits are particularly interesting.
Hidden citations in physics may obscure true impact
In the scientific literature, a citation acts as a mechanism to signal prior knowledge, enhance credibility, and protect against plagiarism. But it also gives credit to the individual or team who established or discovered the knowledge in question, and citations have thus emerged as a metric to...
Tracing the history of perturbative expansion in quantum field theory
Perturbative expansion is a valuable mathematical technique which is widely used to break down descriptions of complex quantum systems into simpler, more manageable parts. Perhaps most importantly, it has enabled the development of quantum field theory (QFT): a theoretical framework that...
A mathematical understanding of project schedules
Complex projects are made up of many activities, the duration of which vary according to a power law; this model can be used to predict overall project duration and delay.
Scientists raise minimum magnetic field of a single measurement to sub-femtotesla level
A research team has, for the first time, realized the quantum amplification of an extremely weak magnetic field by using dark spin, with the magnetic field magnification exceeding a factor of 5,000 and the single magnetic field measurement accuracy reaching 0.1fT level. The study is published in...
Cosmos at large
Scientists discover huge magnetic toroids in the Milky Way halo
The origin and evolution of cosmic magnetic fields is a long-standing unsolved question at the frontier of astronomy and astrophysics research and has been selected as one of the key areas of investigation for many major world-class radio telescopes, including the Square Kilometer Array (SKA)...
Anticipating future discoveries: Scientists explore nontrivial cosmic topology
In a new Physical Review Letters (PRL) study, scientists explore the possibility of nontrivial or exotic topologies in the universe for explaining some of the anomalies seen in Cosmic Microwave Background (CMB).
Student's comparative analysis of primitive asteroids provides context for further research, future NASA missions
The primitive asteroids that UCF physics doctoral student Brittany Harvison studies carry with them traces of their origins and billions of years of our solar system's history.
AI may be to blame for our failure to make contact with alien civilizations
Artificial intelligence (AI) has progressed at an astounding pace over the last few years. Some scientists are now looking towards the development of artificial superintelligence (ASI)—a form of AI that would not only surpass human intelligence but would not be bound by the learning speeds of...
Hubble views the dawn of a sun-like star
Looking like a glittering cosmic geode, a trio of dazzling stars blaze from the hollowed-out cavity of a reflection nebula in this new image from NASA's Hubble Space Telescope. The triple-star system is made up of the variable star HP Tau, HP Tau G2, and HP Tau G3.
Some clever ways to search for primordial black holes
Primordial black holes (PBHs) have recently received much attention in the physics community. One of the primary reasons is the potential link to dark matter. In effect, if PBHs can be proven to exist, there's a very good chance that they are what dark matter, the invisible thing that makes up...
Research reveals the cause of diffuse aurora formation dominated by chorus waves
Recently, a research team led by Prof. Lu Quanming and Prof. Gao Xinliang from the School of Earth and Space Sciences and the Deep Space Exploration Laboratory at the University of Science and Technology of China (USTC) has revealed the underlying cause of diffuse aurora formation dominated by...
A model outlining the microscopic origin of black hole entropy
Black holes are intriguing astronomical objects that have a gravitational pull so strong that it prevents any object and even light from escaping. While black holes have been the topic of numerous astrophysical studies, their origins and underlying physics remain largely a mystery.
A new space mission may help physicists answer 'hairy' questions about black holes
Physicists consider black holes one of the most mysterious objects that exist. Ironically, they're also considered one of the simplest. For years, physicists like me have been looking to prove that black holes are more complex than they seem. And a newly approved European space mission called...
Does the Milky Way have too many satellite galaxies?
The Large and Small Magellanic Clouds are well-known satellite galaxies of the Milky Way, but there are more. It is surrounded by at least 61 within 1.4 million light years (for context the Andromeda galaxy is 2.5 million light years away) but there are likely to be more.
Exo-catalog
International planet hunters unveil massive catalog of strange worlds
While thousands of planets have been discovered around other stars, relatively little is known about them. A NASA catalog featuring 126 exotic, newly discovered worlds includes detailed measurements that allow for comparisons with our own solar system.
Potentially habitable 'exo-Venus' with Earth-like temperature discovered
Astronomers have made the rare and tantalizing discovery of an Earth-like exoplanet 40 light-years away that may be just a little warmer than our own world. The new paper "Gliese 12 b, A Temperate Earth-sized Planet at 12 Parsecs Discovered with TESS and CHEOPS," has been published in the...
The habitable worlds observatory could see lunar and solar 'exo-eclipses'
A future space observatory could use exo-eclipses to tease out exomoon populations.
Planets and asteroids...
Peering into Pluto's ocean using mathematical models and images from the New Horizons spacecraft
An ocean of liquid water deep beneath the icy surface of Pluto is coming into focus thanks to new calculations by Alex Nguyen, a graduate student in Earth, environmental and planetary sciences in Arts & Sciences at Washington University in St. Louis.
Astronomers determine Mars may face more potentially hazardous asteroids than Earth
A team of astronomers at Nanjing University has found evidence that Mars likely has more potentially hazardous asteroids in its path than Earth. In their study, posted on the arXiv preprint server, the group investigated the number of potentially hazardous asteroids that are big enough to cause...
Video: Fireball witnessed by weather satellite
While a meteor lit up the skies over Spain and Portugal recently, it was also captured by the Meteosat Third Generation Imager weather satellite hovering 36,000 km away in geostationary orbit.
NASA study provides new look at orbital debris, potential solutions
New data analysis indicates that NASA and its partners could have more cost-effective methods for dealing with the growing issue of orbital debris than previously thought.
Appropriate exercise is an important part of crew health during space missions
Future missions to the moon and Mars must address many challenges, including preventing loss of bone and muscle tissue in astronauts. Research on the International Space Station is helping to address this challenge.
New scopes
Stargazing in broad daylight: How a multi-lens telescope is changing astronomy
Astronomers at Macquarie University have pioneered a new technique for observing celestial objects during the day, potentially allowing around-the-clock visual monitoring of satellites and greatly improving safety on Earth and in space.
Last edited:
Rhinocrates
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What's known of the Trappist-1 system at this point. Planet images are the generic placeholder type of course.
View: https://www.youtube.com/watch?v=c055VWCVLK4
Alpha Centauri
View: https://www.youtube.com/watch?v=VGZbNjcPOBU
Alpha Centauri
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This number is based on two new papers, linked to below. He mentions in the video that Tabby’s star has now been observed by JWST but the results are not out yet.
Over 53 New Alien Dyson Sphere Candidates:
View: https://youtu.be/VkEGvmfd8dI?si=swRtxLZAQlfCcWMH
This image and Tweet is associated with the JWST observations mentioned above:
commons.m.wikimedia.org
View: https://twitter.com/chrislintott/status/1693495681388851259
Over 53 New Alien Dyson Sphere Candidates:
This image and Tweet is associated with the JWST observations mentioned above:
File:KIC 8462852 MIRI.jpg - Wikimedia Commons
View: https://twitter.com/chrislintott/status/1693495681388851259
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Rhinocrates
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WASP-193b, a giant planet with a density similar to that of cotton candy
An international team led by researchers from of the University of Liège, in collaboration with MIT and the Astrophysics Institute in Andalusia, has just discovered WASP-193b, an extraordinarily low-density giant planet orbiting a distant Sun-like star.
www.eurekalert.org
Related paper:
An extended low-density atmosphere around the Jupiter-sized planet WASP-193 b - Nature Astronomy
Precise mass and radius measurements of giant planet WASP-193 b find an extremely low density of 0.059 ± 0.014 g cm−3. Current evolutionary models cannot fully explain such a low density, but the extended atmosphere makes WASP-193 b very suitable for high-precision characterization via JWST.
www.nature.com
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Earth-size planet discovered around cool red dwarf star shares its name with a biscuit
SPECULOOS-3 b marks the second planetary system ever seen orbiting a red dwarf star.
Related paper:
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A Piece Of A Comet Turned Night Skies Blue As It Hit Earth Late Saturday
Social media became flooded with viral videos of a large blue-green fireball streaking across the sky over Portugal, lighting up the night.
www.forbes.com
FighterJock
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Good job it was not a bigger piece of Comet that potentially could have crashed into the Earth.
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Webb Telescope offers first glimpse of an exoplanet's interior
A surprisingly low amount of methane and a super-sized core hide within the cotton candy–like planet WASP-107 b.
Related paper:
A warm Neptune’s methane reveals core mass and vigorous atmospheric mixing - Nature
Observations of transiting gas giant exoplanets have revealed a pervasive depletion of methane1,2,3,4, which has only recently been identified atmospherically5,6. The depletion is thought to be maintained by disequilibrium processes such as photochemistry or mixing from a hotter interior7,8,9...
www.nature.com
Earth’s Subduction May Have Been Triggered by the Same Event That Formed the Moon - Eos
The giant impact that formed the Moon may also have led to extrastrong mantle plumes that enabled the first subduction event, kick-starting Earth’s unique system of sliding plates.
eos.org
Related paper:
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Observations investigate properties of nearby brown dwarf HD 33632 Ab
Using the Keck II telescope in Hawaii, astronomers have observed a nearby brown dwarf known as HD 33632 Ab. Results of the observational campaign, presented in a paper published May 14 on the pre-print server arXiv, provide more insights into the properties of this substellar object and its...
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…
Lost photos suggest Mars' mysterious moon Phobos may be a trapped comet in disguise
Previously unpublished photos of Mars' moon Phobos hint that the mysterious satellite may actually be a trapped comet — or perhaps just a piece of one, along with its twin moon Deimos.
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Euclid celebrates first science with sparkling new images:
View: https://youtu.be/wtiN1xXSspk?si=Nl1GGKlwg6l80TFJ
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Earth 2.0 or its evil twin? Discovery of Earth-sized planet could shed light on conditions necessary for life
The discovery of a planet similar to Venus around a star in the neighborhood of the solar system raises hopes that astronomers may someday unlock the secret to why life appeared on Earth.
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New Saturn-mass exoplanet detected by astronomers
Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new Saturn-mass planet orbiting a solar-type star known as TOI-2447. The finding was reported in a research paper published May 12 on the pre-print server arXiv.
Related paper:
More:
Potentially habitable 'exo-Venus' with Earth-like temperature discovered
Astronomers have made the rare and tantalizing discovery of an Earth-like exoplanet 40 light-years away that may be just a little warmer than our own world. The new paper "Gliese 12 b, A Temperate Earth-sized Planet at 12 Parsecs Discovered with TESS and CHEOPS," has been published in the...
That should be Vulcan, not Epsilon Eridani
New technology
An Optical Daytime Astronomy Pathfinder for the Huntsman Telescope | Publications of the Astronomical Society of Australia | Cambridge Core
An Optical Daytime Astronomy Pathfinder for the Huntsman Telescope
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Newly Discovered Comet On Its Way To Earth Should Be Visible To The Naked Eye Soon
It could get as bright as Venus come late summer/early autumn.
www.iflscience.com
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Cool World’s - NASA’s In Trouble
View: https://youtu.be/SZ0msgYjUv4?si=vRGDhJ-7nz4FusVe
Finishes with an impassioned plea for spending on things like astronomy against the argument that spending on such areas is frivolous in relation to issues such as climate change.
Finishes with an impassioned plea for spending on things like astronomy against the argument that spending on such areas is frivolous in relation to issues such as climate change.
Rhinocrates
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Considering that many politicians campaign - and win - on denial of evolution, I would be at all surprised if flat earthers appear in government soon.
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Venus Appears to Be a Churning Hotbed of Volcanic Activity
Magma might be roiling and bubbling just underneath the surface of Venus, even as you read these words – and possibly breaking through.
www.sciencealert.com
Related video & paper:
Evidence of ongoing volcanic activity on Venus revealed by Magellan radar - Nature Astronomy
Observation of new lava flows between different Magellan radar scans in regions of Sif Mons and Niobe Planitia confirms that volcanism on Venus is still ongoing. This evidence also suggests the planet’s volcanic activity exceeds previous estimates.
www.nature.com
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Rivers of Lava on Venus Reveal a More Volcanically Active Planet - Slashdot
Witnessing the blood-red fires of a volcanic eruption on Earth is memorable. But to see molten rock bleed out of a volcano on a different planet would be extraordinary. That is close to what scientists have spotted on Venus: two vast, sinuous lava flows oozing from two different corners of...
science.slashdot.org
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