Astronomy and Planetary Science Thread

That is not bad for an object once thought to be only an asteroid, to have more organic matter than previously thought

The Moon is big enough to have a "down."

Most asteroids you can dock with --and far enough out, you have a brutal type of cryovolcanism that could be harsh.

Ceres may have the perfect amount of gravity and heat to where hydrodynamics is all.

Awhile back, I made the mistake of calling something physics free. What I meant was--you can be frilly like a sea horse as long as you don't swim fast to where evolution starts to streamline you.

This whole body of Ceres may be an organic chemistry version of a fractionating tower--with enough dirt and crud to keep the Sun from drying you out.

Might a physical fractal be possible for Ceres level gravity?

Life perhaps spawns there--then gets spalled off? Or at least concentrated organics that our planet refines with our smokers from a younger, hotter Earth serving as alembics of the deep?

No wonder we're alone.
 
An interesting new video from Scott Manley:


The gravitational tidal effects of planets can destroy other planetoids which come too close, and two recent papers use this process to explain the formation of the moons of Mars and, the cratering record of the Earth.

I use a couple of different pieces of simulation software to demonstrate some of these effects:
 
The Hubble Tension is looking increasingly like it’s a real thing and not a data error.

New observations made by the James Webb Space Telescope (JWST) have further cemented one of the most bizarre observations in all of physics — that the universe expanded at different speeds across varying stages of its lifetime.



Now, further measurements have used the largest sample of JWST data collected over its first two years in space to further cement the problem. The new physics that could answer the mystery remains unclear but, as the researchers outline in a paper published Dec. 9 in the The Astrophysical Journal, the tension is not going anywhere.

"The more work we do the more it is apparent that the cause is something much more interesting than a telescope flaw. Rather it appears to be a feature in the universe," lead study author and Nobel laureate Adam Riess, professor of physics and astronomy at Johns Hopkins University, told Live Science. "[The] next steps are many. More data on many fronts and new ideas are needed."


I cannot link to the related paper as it comes up as a 404 error, perhaps this info was released before it was meant to be?
 
Surprised about that Flyaway, the Universe expanding at various speeds in it's past. Surely that must be what explains the mystery behind Dark Energy.
 
Interesting find Michel Van, will they ever know about possible life at exoplanet K2-18b? Or will it just go down in history as a false positive? Fingers and Toes crossed that it is not a false positive.
 
The Hubble Tension is looking increasingly like it’s a real thing and not a data error.

New observations made by the James Webb Space Telescope (JWST) have further cemented one of the most bizarre observations in all of physics — that the universe expanded at different speeds across varying stages of its lifetime.

So cosmic stretch-marks?
 
Last edited:
So cosmic stretch-marks?
in certain way yes !

It would make sense, there are remains of this event.
Under most Big bang theory, the Universe began with such high energy density, that our Laws of Physic can't not applied.
it can be that universe expanded in begin faster as speed of light, unlit energy density drops were theory of relativity begins to work.

Interesting find Michel Van, will they ever know about possible life at exoplanet K2-18b? Or will it just go down in history as a false positive? Fingers and Toes crossed that it is not a false positive.
There bunch of New Telescopes planned for Exoplanets studies
like ARIEL or Atmospheric Remote-sensing Infrared Exoplanet Large-survey
this one will study the composition of Exoplanet Atmospheres in 2029
 
Some new results from recent studies concerning Venus, from Anton Petrov:


Hello and welcome! My name is Anton and in this video, we will talk about Venus!
Links:
Other Venus videos:
• Venus Updates: Strange Flashes, Atmos...
• Experiments Just Solved Several Myste...
• Gases Hinting At Alien Life Detected ...
Videos mentioned:
• True Origins of Water on Earth - Ring...
• Venus Curse Is Broken! NASA Confirms ...
• Evidence For The Biggest Impact Crate...
#venus #astronomy #astrobiology

0:00 Was Venus similar to Earth? Did it have an ocean?
2:20 Recent studies suggest sulfuric acid drives many cycles
5:20 Dry volcanic eruptions
6:35 Mission to Venus
7:02 Tessera reveal a massive crater
10:45 Hope for life on Venus
13:00 Conclusions
 
Venus looks to have always been hell.
An extrasolar impactor to spin it up and blow off most of the atmosphere would have been the best thing for it.
 
And of course with the Sun getting hotter as it is getting older there is always that to consider as well, Venus would have suffered anyway without the impactor to spin it up. Venus is now on the inside edge of the Goldilocks zone which means that it is now inhospitable to life and Earth will suffer the same fate in a few billion years.
 
NASA has released the findings from its' first extra-terrestrial crash investigation, from Scott Manley:


This morning scientists and engineers from JPL & NASA presented their investigation into the crash of Ingenuity, the Mars Helicopter which had pushed the limits of technology over its 3 year career.The root cause was the navigation system became unable to track features over the bland terrain where the accident happened leading to a loss of control.The full investigation will be published next month but you can watch the presentation from the AGU Meeting
https://www.youtube.com/watch?v=p45y3ea9vHY&t=0s
• AGU24 Press conference: The First Air...

As Scott Manley likes to sign off
, "Fly Safe";):D.
 
Signals From Black Holes May Be Non-Random – Information Could Be Getting Out

A team of scientists have suggested a possible solution to the famously tricky black hole information loss paradox, first proposed by Professor Stephen Hawking nearly 50 years ago.



"Giddings proposed that the information which fell into the BH can escape it via non-violent non-locality (NVNL), a non-local interaction between the inside and the outside of the BH, with associated nonviolent space-time fluctuations from this information transfer," the team explain in their new paper, which has been posted as a preprint and has not yet been peer-reviewed.

"In contrast to firewalls, these quantum fluctuations would be spread out over a larger distance range – up to a Schwarzschild radius away."



If this is the case, and information really does escape from a black hole due to non-locality, the team suggests we should be able to detect it in gravitational waves, with the waves carrying information from what fell into the black hole rather than random noise.


Related paper:

 
NASA has released the findings from its' first extra-terrestrial crash investigation...
it hit ground--go ow
The End

That'll be $20,000.

So, if you do a CFIT into a cornice due to snow blindness..it's called a white out--

So I guess this was a red-out?

Space Flight


Astronomy

 
Last edited:
Astrum has put out a video about the last ever videos received from Spirit:


The final episode in our Spirit Series, • Spirit Rover join the Mars rover for its last days on the red planet. https://www.youtube.com/channel/UChn_-OwvV63mr1yeUGvH-BQ
Credits
Writer: Chris Bartlett
Editor: Nathália Huzian
Thumbnail Designer: Peter Sheppard
Producer: Alex McColgan / Raquel Taylor
NASA/ESO/ESA
 
SCIENTISTS SAY SOMETHING MAY HAVE VISITED THE SOLAR SYSTEM AND REARRANGED THE PLANETS

Now, a new yet-to-be-peer-reviewed study suggests that an enormous interstellar object up to fifty times the mass of Jupiter may have been responsible for stirring the planets out of their original orbits — showing that perhaps not even the Sun can protect us from the chaos caused by foreign intruders.


Related paper:

 
From Curiosity Stream:


Recent advancements in space technology are uncovering more wonders within our solar system than ever before. Saturn, the mighty gas giant, has now claimed the lead in the moon count with newly discovered moons orbiting its vast atmosphere. What else might we find in our cosmic neighborhood as technology continues to evolve?
The latest developments in space technology continue to reveal the wonders of our solar system. With new moons recently spotted orbiting Saturn, the gas giant has taken the lead in our cosmic neighborhood's moon count.
 
Discovery of a mostly evaporated planet, from Anton Petrov:


0:00 Densent planet found so far, K2-360b
0:45 Star it orbits
1:40 Properties and the new discovery
2:25 Too dense to exist?
3:25 Previously discovered similar planets
4:05 How it's possible - potential explanations
5:20 Chthonian planets and how they form
7:00 Conclusions
 
Astrum has an interesting video out about the unforeseen consequences of nuclear-tests in outer-space conducted in the late 1950s and early 1960s:


The Reason Why We Stopped Sending Nukes Into Space. Starfish Prime and Operation Fishbowl.
 
Scott Manley has just uploaded a video about the atmospheric-probe that the Galileo-probe released just prior to Jupiter orbit insertion:


The Galileo mission to Jupiter featured a space probe which would be dropped into the atmosphere of Jupiter. Because of this planet's gravity the atmosphere probe would experience conditions that no other spacecraft has seen. Entry velocities 7 times faster than those experiences by humans returning from orbit, massively higher temperatures and head fluxes, and no way to test the system fully on Earth.

This atmospheric-probe experienced savage deceleration loads (Briefly over 230Gs) before it deployed its' parachute.
 
All it takes to kill a human is 12Gs, that must have been quite a ride going down through the atmosphere of Jupiter for the probe.
 
IMO NASA should've started planning for a followup Jupiter orbiter with an atmospheric probe after it had analysed the data from the Galileo atmospheric-probe.
 
Saturn's spectacular rings may be far older than we thought – according to a new study, they may have been there from the gas giant's birth.


Related paper:

 
NASA Goddard has recently released this video about imaginary that the HST has captured of extra-solar protoplanetary discs:


NASA's Hubble Space Telescope has captured stunning images of protoplanetary disks—dynamic, swirling structures of gas and dust surrounding young stars.
In this video, Dr. Padi Boyd takes us on a journey through these remarkable objects, explaining how Hubble's observations are unraveling the mysteries of planet formation and providing a glimpse into the birthplaces of new solar systems.
For more information, visit https://nasa.gov/hubble.
Credit: NASA's Goddard Space Flight Center
Producer, Director & Editor: James Leigh
Director of Photography: James Ball
Executive Producers: James Leigh & Matthew Duncan
Production & Post: Origin Films
Video Credits:
Hubble Space Telescope Animation:
ESA/Hubble - M. Kornmesser & L. L. Christensen
Exoplanet Animations:
ESA/Hubble - M. Kornmesser & L. Calçada
Music Credits:
PREMIUM BEAT BY SHUTTERSTOCK
The Search by Northern Points
"Transcode" by Lee Groves [PRS], and Peter George Marett [PRS] via Universal Production Music
This video can be freely shared and downloaded at https://svs.gsfc.nasa.gov/14731. While the video in its entirety can be shared without permission, the music and some individual imagery may have been obtained through permission and may not be excised or remixed in other products. Specific details on such imagery may be found here: https://svs.gsfc.nasa.gov/14731. For more information on NASA’s media guidelines, visit https://www.nasa.gov/multimedia/guide....
See more Hubble videos on YouTube: • Hubble Space Telescope
 
Earth-Sized Planet May Have An Atmosphere, Scientists Say

A paper published today in Nature Astronomy reveals that Trappist-1 b — the planet closest to its star — may not be the dark rocky planet without an atmosphere that it was initially thought to be.

In fact, the opposite may be true. New observations using JWST, this time in mid-infrared wavelengths of light, reveal two scenarios for Trappist-1 b:

An airless planet with a surface that shows no signs of weathering, which could indicate geological activity such as volcanism and plate tectonics.

A planet with a hazy carbon dioxide atmosphere is also viable — perhaps similar to Saturn's giant moon Titan.


Related paper:

 
Earth-Sized Planet May Have An Atmosphere, Scientists Say




Related paper:

The Nature paper is paywalled except for the abstract, but the preprint is available here:

 

Similar threads

Please donate to support the forum.

Back
Top Bottom