Pebble accretion is the leading theory for the formation of #exoplanets more massive than the Earth.

But any parameters influence #planet growth in the pebble accretion models, including pebble fragmentation velocity, turbulence strength, stellar #metallicity, stellar mass, and planet location.

Planets orbiting #stars with higher metallicity have an overall higher probability of reaching their pebble isolation mass than those orbiting lower metallicity stars, but the impact of metallicity is not as high as that of stellar mass, orbital separation, and most importantly disc turbulence.

#astronomy
https://astrobiology.com/2025/05/can-close-in-exoplanets-form-by-pebble-accretion.html

It's good to be home (but I miss Jordan already)!

:https://www.nasa.gov/history/90-years-of-our-changing-views-of-earth/

APOD from 2025-05-03

Titan: #Moon over #Saturn

Cassini images reveal Titan's anti-Saturn side, with a dense atmosphere and Earth-like liquid cycle. Visible are the dark Shangri-La dunes and the Huygens probe's landing site—the farthest from #Earth.

HD image at https://apod.nasa.gov/apod/ap250503.html#space #astronomy #planet

Cheesa #space #cheese #Käse #planet #chatgpt #aigenerated

APOD from 2025-05-01

MESSENGER's Last Day on #Mercury

MESSENGER, the first spacecraft to orbit Mercury, ended its mission with a crash into Shakespeare basin's rim on April 30, 2015. This image shows the area with terrain heights color-coded; it impacted at 4 km/s, creating a 16m crater. Its loss was confirmed when no signal emerged from behind Mercury.

HD image at https://apod.nasa.gov/apod/ap250501.html#space #astronomy #planet

Today I'll drift amongst the sea of passers-by to a soundtrack of listless yet peaceful easy-listening crackling through the choir of speakers.

Nothing that a little knickknack for the ship won't be able handle…

Experience the full log at https://auriscenes.com/log/242
#HearNewWorlds #mall #planet #music

Astronomers searching for #planet nine find possible hints of something that doesn't resemble the postulated planet 9 at all, but is something entirely different.

Some experts are skeptical that the signal, just a single pair of faint dots, will survive scrutiny and follow-up observations.

But if it does, the object lies on an orbit far outside the original planet nine prediction—rendering it an entirely different planet.

#astronomy
https://www.science.org/content/article/astronomers-searching-planet-nine-find-possible-hints-different-planet

Days are getting longer, outside, but also on this #planet. Since its initial accretion, Earth's spin has been slowing down, lengthening the days. These longer days may allow for more oxygen production and carbon burial, making it #habitable for the likes of us.
https://www.nature.com/articles/s41561-021-00784-3

(25 Apr) Scientists find ’breathing’ magma cap inside Yellowstone supervolcano

Yellowstone’s supervolcano appears to have a magma cap that vents pressure and reduces the chances of a massive eruption happening anytime soon.

https://s.faithcollapsing.com/ov2w0
Archive: ia: https://s.faithcollapsing.com/hyv18

#planet-earth

#Petrobas wants to START oildrilling in the #Amazon forest! The lungs of our #planet no less!
I just signed this #petition.PLEASE join me! #ClimateEmergency #ClimateCrisis #StopFossilFuels #JustStopOil #SaveOurPlanet #GreenEnergy is great for our #Environment AND cheaper! Stop this insanity, #JustStopOil
https://action.eko.org/a/ibama-no-petrobras-oil-drilling-the-amazon/

APOD from 2025-04-26

Barred Spiral #Galaxy NGC 5335

#Hubble captures NGC 5335, a face-on spiral galaxy in Virgo, 200 million light-years away. Its prominent central bar channels material for star formation. Background galaxies dot the sharp image as Hubble marks 35 years in orbit.

HD image at https://apod.nasa.gov/apod/ap250426.html#space #astronomy #telescope #planet #earth

Jupiter - March 3, 2025.
Celestron NexStar Evolution 6 + ZWO ASI585MC Pro.
4500mm, f30, derotation from 12 x 2-minute captures, best 200 frames each.
#telescope #telescopes #celestron #celestrontelescope #celestronnexstar #nexstarevolution #nexstarevolution6 #zwo #zwoasi #zwoasi585mc #astro #astrophoto #astrophotos #astrophotography #astrophotographer #spacephotography #astronomy #spaceexploration #nasa #universe #space #deepsky #deepspace #solarsystem #planet #planets #jupiter

A Disintegrating Rocky Planet with Prominent Comet-like Tails around a Bright Star: https://iopscience.iop.org/article/10.3847/2041-8213/adbf21 -> Astronomers discover a #planet that’s rapidly disintegrating, producing a comet-like tail: https://news.mit.edu/2025/astronomers-discover-planet-thats-rapidly-disintegrating-producing-comet-tail-0422 - the small and rocky lava world sheds an amount of material equivalent to the mass of Mount Everest every 30.5 hours.