AstroMigration

@AstroMigration@universeodon.com

Follows and boosts #astronomy, #space and #AstroPhysics experts.

Follow this account for curated topical posts.

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Banner Artwork: Julio Lacerda https://linktr.ee/julio.lacerda
Avatar Artwork: Brandon Pilcher https://brandonpilchersart.com

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jaztrophysicist, to random French

deleted_by_author

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    jaztrophysicist,

    deleted_by_author

    AkaSci, to space
    @AkaSci@fosstodon.org avatar

    Let’s take a look at the recent announcement of the “astonishing” discovery of a global subsurface ocean on Saturn’s “Death Star” icy moon Mimas.

    The discovery is based on new modeling/simulation of Mimas’s "wobble" (libration) around its axis, its orbital shift over 13 years and Mimas’s tidal heating. It rules out the alternate hypothesis of an oval shaped rocky core. There is no direct evidence of liquid water.

    https://www.nature.com/articles/d41586-024-00345-9
    https://images.nasa.gov/details/PIA12570

    1/n

    AkaSci,
    @AkaSci@fosstodon.org avatar

    Here is a list of planets and moons known to have oceans -

    • Earth
    • Dwarf planet Ceres in the asteroid belt
    • Jupiter's moons Europa, Ganymede and Callisto
    • Saturn's moon Titan and Enceladus
    • Neptune's moon Triton
    • Pluto

    Mimas now joins the club.

    Except on earth, these oceans are subsurface. There are plenty of other icy worlds, which may harbor subsurface oceans, if they contain heat sources like radioactive elements or tidal forces.

    Source: https://www.planetary.org/articles/where-are-the-ocean-worlds-in-our-solar-system
    #Space
    7/n

    AkaSci, (edited )
    @AkaSci@fosstodon.org avatar

    Saturn's moon Mimas was discovered by astronomer William Herschel on Sept. 17, 1789 using his 40-foot telescope.

    Herschel's 40-foot telescope, the largest telescope of its time, was a reflecting telescope constructed between 1785 and 1789 at Observatory House in Slough, England. It used a 48-inch (120 cm) diameter primary mirror with a 40-foot-long metal tube and no secondary mirror. Herschel used it to discover Enceladus and Mimas.

    https://en.wikipedia.org/wiki/40-foot_telescope
    https://owlcation.com/stem/William-Herschel-and-the-Giant-40-foot-Telescope
    #Space
    8/n

    skrishna, to space
    @skrishna@wandering.shop avatar

    My weekly space news show Ad Astra is here! Have 10 minutes? Then you can hear about my favorite space, space science, and space flight stories this week.

    https://youtu.be/In-obkK-uLI

    W_Lucht, to random
    @W_Lucht@mstdn.social avatar

    This is not funny.
    It's not just another news story, to be scrolled past.
    It's (another) call for 👉 far-reaching immediate action. Anyone listening?

    https://www.science.org/doi/10.1126/sciadv.adk1189

    CNN titles "Critical Atlantic Ocean system is showing early signs of collapse, prompting warning from scientists"
    The Washington Post titles "Why this is one of the planners shifts scientists are most worried about"
    Newsweek titles "Atlantic ocean's circulation could collapse"

    catherineryanhyde, to random
    @catherineryanhyde@astrodon.social avatar

    The sun in Hydrogen-Alpha today. A lot of action on the eastern limb, soon to rotate into Earth-facing view.

    fraser, to random
    @fraser@m.universetoday.com avatar

    How did life get established on Earth so quickly? Maybe it started on another planet and drifted here inside a meteorite. This is known as Panspermia, and it seems possible, in theory. A new paper takes this idea to the next level, proposing that dust particles can escape a planet's gravity and fly off into space, carrying life to other worlds and even other star systems. In 5 billion years, grains of dust from the Solar System will reach over 10,000 other star systems.

    https://arxiv.org/abs/2402.04990

    rsliva, to astrophotography

    The Horsehead Nebula with the Flame Nebula.
    275 x 10s exposures taken with the 16" reflector using the ASI2400MC-P camera and a dual band filter. The halos around the bright star are an artifact of internal reflection. Artifacts of field rotation are also visible upon close inspection, but for me this is pure joy and why I love my hobby.

    fraser, to random
    @fraser@m.universetoday.com avatar

    Dark matter only interacts with regular matter and energy through gravity, so it's practically invisible. And yet, that gravity can be substantial, bending light from background objects so much that astronomers can map its location and density. Astronomers have used the Subaru Telescope to make a detailed survey of the influence of dark matter in the Coma Cluster, located 321 million light-years away, mapping the cosmic web surrounding the galaxies in the region.

    https://subarutelescope.org/en/results/2024/02/07/3367.html

    starrytimepod, to Astronomy

    🚨 We're back tomorrow AM with our #astronomy (aka Cosmic Background) #podcast episode on the #constellation Auriga: The Charioteer!

    So -- what's this one look like to y'all?? Are you able to make out a Charioteer (or does it look like another constellation guy we've discussed this season... 🙃 )

    #AstroDon #Entertainment #Science #SciComm #Space

    📷 :https://www.iau.org/static/public/constellations/gif/AUR.gif

    PhilStooke, to random
    @PhilStooke@mastodon.social avatar

    These three views were taken from the LM windows, A before EVA 1, B after EVA 1, C after EVA 2. Note the LM shadow getting shorter.

    fraser, to random
    @fraser@m.universetoday.com avatar

    We know the human body can survive in space for at least a year despite various health problems. But what about longer trips to space, like voyages to Mars? When we go into space, we take our gut microbiomes with us, which means we must also consider their long-term health in a high-radiation environment. In a new paper, biologists consider what impact spaceflight might have on our gut flora and what risks this might pose to astronaut health.

    https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2023.1237564/full

    PhilStooke, to random
    @PhilStooke@mastodon.social avatar

    The top part of this map is one section of a 2-part map of EVA 1 for Apollo 14. Mitchell's 'quadruplet' crater is identified as well as some of the activities including collecting 'football-sized' rocks. The bottom part of the map is a summary of activities at the end of EVA 2 when Mitchell visited Turtle Rock and Shepard walked out to the ALSEP to check the central station antenna (not labelled on this half of the map). Tomorrow: getting some context.

    jascha, to earthquake
    @jascha@mastodon.social avatar

    M5.7 deep (35-40 km) near Pahala, . Two interesting hypotheses as to the origin of these events: flexure of the lithosphere due to weight of the overlying or migrating into the Pāhala area & stalling at depth, pressurizing the region
    https://www.usgs.gov/news/volcano-watch-new-research-sheds-light-recent-pahala-earthquake-swarms

    fraser, to random
    @fraser@m.universetoday.com avatar

    The habitable zone is a region where liquid water can exist on the surface of a planet. The Solar System includes Venus, Earth, and Mars, but billions of years from now, the Sun will bloat into a red giant, consuming the inner planets. But it will always have a habitable zone; it'll just shift outward in the Solar System, lasting about 100 million years. This could include the moons of Jupiter, which will go in and out of the habitable zone many times.

    https://iopscience.iop.org/article/10.3847/1538-4357/ad1685

    fraser, to random
    @fraser@m.universetoday.com avatar

    NASA's Deep Space Network communicates with a fleet of robotic spacecraft across the Solar System. These communications use radio waves, but now they're testing a new system that can send high-bandwidth signals using lasers. One disk, Deep Space Station 13, was recently retrofitted with an optical receiver to simultaneously receive radio and laser communications. In a recent test, it received 40 times more data from laser communication than can be transmitted via radio.

    https://www.jpl.nasa.gov/news/nasas-new-experimental-antenna-tracks-deep-space-laser

    Landru79, to random Spanish
    @Landru79@astrodon.social avatar

    Evolución nubosa en el casquete polar marciano

    SPACECRAFT NAME = MARS GLOBAL #SURVEYOR
    TARGET NAME = #MARS
    START TIME = 2004-12-XX
    INSTRUMENT = "MOC-WA"
    FILTER NAME = RED + BLUE

    NASA/JPL/MSSS/j. Roger

    video/mp4

    fraser, to random
    @fraser@m.universetoday.com avatar

    This week, NASA launched its new Plankton, Aerosol, Climate, ocean Ecosystem (PACE) satellite atop a SpaceX Falcon 9 rocket. The purpose of this satellite is to track different factors that affect the Earth's climate, including atmospheric particles, conditions of the oceans, and even the distribution of phytoplankton. It will see where organisms are present in the ocean every day, helping to track changes in the marine environment and predict harmful algal blooms.

    https://www.nasa.gov/news-release/nasa-launches-new-climate-mission-to-study-ocean-atmosphere/

    fraser, to random
    @fraser@m.universetoday.com avatar

    The Large Hadron Collider helped particle physicists fill in the last missing piece of the Standard Model of particle physics: the Higgs Boson. Unfortunately, it hasn't been able to make other progress, helping to unite quantum mechanics with gravity or learning the true nature of dark matter. For the next step, physicists want to build a collider three times longer than the LHC, called the Future Circular Collider, capable of smashing particles with vastly more energy.

    https://fcc.web.cern.ch/overview

    starrytimepod, to Astronomy

    Galaxy AM 1054-325 -- a galaxy being tugged apart by its neighbor -- captured by the Space Telescope 🤩

    📷 & More Info: https://science.nasa.gov/missions/hubble/nasas-hubble-traces-string-of-pearls-star-clusters-in-galaxy-collisions/

    catherineryanhyde, to random
    @catherineryanhyde@astrodon.social avatar

    I turned up the exposure and created this "artificial eclipse" to show off the prominences a bit more. I'm so thrilled to see sky I just can't stop taking pictures.

    AstroDave, to random
    @AstroDave@astrodon.social avatar

    The Heart Shaped Antennae Galaxies - Image Credit: Kent E. Biggs - Astronomy Picture of the Day (from February 7th) #APOD - https://apod.nasa.gov/apod/ap240207.html

    UniversoMagico, to Astronomy Spanish
    @UniversoMagico@vivaldi.net avatar

    - Hickson 88 by Warren Keller and Mike Selby

    https://www.universomagico.net/2024/02/hickson-88-por-warren-keller-y-mike.html

    The compact group of galaxies Hickson 88 is located in the direction of the Aquarius constellation and is located at a distance of about 270 million light years from the Milky Way. It is mainly composed of four prominent galaxies, cataloged as NGC 6975, also called NGC 6976, a spiral discovered by Albert Marth on.....

    umplus, to Astronomy Spanish
    @umplus@mastodon.online avatar

    - Hickson 88 by Warren Keller and Mike Selby

    https://www.universomagico.net/2024/02/hickson-88-por-warren-keller-y-mike.html

    The compact group of galaxies Hickson 88 is located in the direction of the Aquarius constellation and is located at a distance of about 270 million light years from the Milky Way. It is mainly composed of four prominent galaxies, cataloged as NGC 6975, also called NGC 6976, a spiral discovered by Albert Marth on.....

    VRubinObs, to random
    @VRubinObs@astrodon.social avatar

    How will Rubin help inform future spacecraft missions without leaving the ground? Here's what Rubin scientist Siegfried Eggl had to say!

    https://youtu.be/uitWbbpLkgU

    Want the full story? Read our newest release at https://rubinobservatory.org/news/new-era-space-missions

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