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#solar-system — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #solar-system, aggregated by home.social.

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  1. An ancient moonpocalypse may explain #Neptune’s odd #moon #Nereid
    The strange satellite was born in a steady, circular orbit around Neptune, then tossed into its elongated orbit during a chaotic encounter with a #Pluto-sized body that ejected or pulverized all its sibling #moons. This idea counters assumption that Nereid formed in #KuiperBelt, the cold reservoir of #space rocks in outer #solarsystem, and was pitched into its present orbit later.
    sciencenews.org/article/neptun
    archive.ph/3RUYD

  2. An ancient moonpocalypse may explain #Neptune’s odd #moon #Nereid
    The strange satellite was born in a steady, circular orbit around Neptune, then tossed into its elongated orbit during a chaotic encounter with a #Pluto-sized body that ejected or pulverized all its sibling #moons. This idea counters assumption that Nereid formed in #KuiperBelt, the cold reservoir of #space rocks in outer #solarsystem, and was pitched into its present orbit later.
    sciencenews.org/article/neptun
    archive.ph/3RUYD

  3. 2026-07-13 12:00:00 UTC (Delta: 2026-07-06)

    MERCURY
    - Distance (km): 85,990,367.85 km (-286,325.11 km)
    - Distance (AU): 0.57 (-0.00)
    - Light travel time: 4 min 46.83 s (-0.96 s)
    - Orbital speed: 41.01 km/s (+1.77 km/s)

    Image: Peak Rings on Mercury
    Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

    #Mercury #Space #SolarSystem

  4. 2026-07-13 12:00:00 UTC (Delta: 2026-07-06)

    MERCURY
    - Distance (km): 85,990,367.85 km (-286,325.11 km)
    - Distance (AU): 0.57 (-0.00)
    - Light travel time: 4 min 46.83 s (-0.96 s)
    - Orbital speed: 41.01 km/s (+1.77 km/s)

    Image: Peak Rings on Mercury
    Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

    #Mercury #Space #SolarSystem

  5. Witness Neptune’s deep blue emerge from the void through the lens of Voyager 2 — humanity’s only close-up look at the eighth planet, captured in 1989 as the spacecraft raced past on its way to interstellar space. 🔵🚀

    #space #neptune #voyager2 #nasa #astronomy #universe #cosmos #solarsystem

    @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] #space #science #nasa #astronomy
  6. Witness Neptune’s deep blue emerge from the void through the lens of Voyager 2 — humanity’s only close-up look at the eighth planet, captured in 1989 as the spacecraft raced past on its way to interstellar space. 🔵🚀

    #space #neptune #voyager2 #nasa #astronomy #universe #cosmos #solarsystem

    @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] #space #science #nasa #astronomy
  7. 2026-07-12 12:00:00 UTC (Delta: 2026-07-05)

    PLUTO [ *1930 +2006 ]
    - Distance (km): 5,171,837,171.35 km (-4,653,176.16 km)
    - Distance (AU): 34.57 (-0.03)
    - Light travel time: 4 h 47 min 31.39 s (-15.52 s)
    - Orbital speed: 5.25 km/s (+0.00 km/s)

    Image: Ice Volcanoes on Pluto?
    Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

    #Pluto #Space #SolarSystem

  8. 2026-07-12 12:00:00 UTC (Delta: 2026-07-05)

    PLUTO [ *1930 +2006 ]
    - Distance (km): 5,171,837,171.35 km (-4,653,176.16 km)
    - Distance (AU): 34.57 (-0.03)
    - Light travel time: 4 h 47 min 31.39 s (-15.52 s)
    - Orbital speed: 5.25 km/s (+0.00 km/s)

    Image: Ice Volcanoes on Pluto?
    Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

    #Pluto #Space #SolarSystem

  9. Witness Neptune’s deep blue emerge from the void through the lens of Voyager 2 — humanity’s only close-up look at the eighth planet, captured in 1989 as the spacecraft raced past on its way to interstellar space. 🔵🚀

    #space #neptune #voyager2 #nasa #astronomy #universe #cosmos #solarsystem

    @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] #space #science #nasa #astronomy
  10. Witness Neptune’s deep blue emerge from the void through the lens of Voyager 2 — humanity’s only close-up look at the eighth planet, captured in 1989 as the spacecraft raced past on its way to interstellar space. 🔵🚀

    #space #neptune #voyager2 #nasa #astronomy #universe #cosmos #solarsystem

    @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] #space #science #nasa #astronomy
  11. ⭐ 4.5 billion years ago, a star wandered close enough to reshape our entire outer Solar System.

    A 2024 study in Nature Astronomy ran 3,000+ simulations and found that a star roughly 0.8x the Sun's mass passed within 110 AU (about 0.2% of the distance to the next nearest star today) at a steep 70-degree angle.

    The gravitational handshake flung icy objects onto wild eccentric orbits, created Sedna-like bodies that swing out hundreds of AU, and even produced worlds orbiting backward, opposite to every planet.

    The best part: this wasn't even the main prediction. Retrograde objects appeared as a natural bonus that the modelers weren't looking for.

    At least 140 million Sun-like stars in the Milky Way have likely experienced a similar encounter. The Vera Rubin Observatory, which started its survey in 2025, should discover roughly 40,000 new trans-Neptunian objects and put this to the test.

    Sources:
    Pfalzner et al. (2024), Nature Astronomy: nature.com/articles/s41550-024
    Sky & Telescope: skyandtelescope.org/astronomy-

    #astronomy #solarsystem #space

  12. ⭐ 4.5 billion years ago, a star wandered close enough to reshape our entire outer Solar System.

    A 2024 study in Nature Astronomy ran 3,000+ simulations and found that a star roughly 0.8x the Sun's mass passed within 110 AU (about 0.2% of the distance to the next nearest star today) at a steep 70-degree angle.

    The gravitational handshake flung icy objects onto wild eccentric orbits, created Sedna-like bodies that swing out hundreds of AU, and even produced worlds orbiting backward, opposite to every planet.

    The best part: this wasn't even the main prediction. Retrograde objects appeared as a natural bonus that the modelers weren't looking for.

    At least 140 million Sun-like stars in the Milky Way have likely experienced a similar encounter. The Vera Rubin Observatory, which started its survey in 2025, should discover roughly 40,000 new trans-Neptunian objects and put this to the test.

    Sources:
    Pfalzner et al. (2024), Nature Astronomy: nature.com/articles/s41550-024
    Sky & Telescope: skyandtelescope.org/astronomy-

    #astronomy #solarsystem #space

  13. 2026-07-11 12:00:00 UTC (Delta: 2026-07-04)

    NEPTUNE
    - Distance (km): 4,428,712,696.03 km (-17,262,876.14 km)
    - Distance (AU): 29.60 (-0.12)
    - Light travel time: 4 h 6 min 12.60 s (-57.58 s)
    - Orbital speed: 5.47 km/s (+0.00 km/s)

    Image: ARC-1989-AC89-7036
    Credit: JPL

    #Neptune #Space #SolarSystem

  14. 2026-07-11 12:00:00 UTC (Delta: 2026-07-04)

    NEPTUNE
    - Distance (km): 4,428,712,696.03 km (-17,262,876.14 km)
    - Distance (AU): 29.60 (-0.12)
    - Light travel time: 4 h 6 min 12.60 s (-57.58 s)
    - Orbital speed: 5.47 km/s (+0.00 km/s)

    Image: ARC-1989-AC89-7036
    Credit: JPL

    #Neptune #Space #SolarSystem

  15. 2026-07-10 12:00:00 UTC (Delta: 2026-07-03)

    URANUS
    - Distance (km): 3,017,893,023.94 km (-11,649,970.14 km)
    - Distance (AU): 20.17 (-0.08)
    - Light travel time: 2 h 47 min 46.61 s (-38.86 s)
    - Orbital speed: 6.72 km/s (+0.00 km/s)

    Image: Uranus - Final Image
    Credit: NASA/JPL

    #Uranus #Space #SolarSystem

  16. 2026-07-10 12:00:00 UTC (Delta: 2026-07-03)

    URANUS
    - Distance (km): 3,017,893,023.94 km (-11,649,970.14 km)
    - Distance (AU): 20.17 (-0.08)
    - Light travel time: 2 h 47 min 46.61 s (-38.86 s)
    - Orbital speed: 6.72 km/s (+0.00 km/s)

    Image: Uranus - Final Image
    Credit: NASA/JPL

    #Uranus #Space #SolarSystem

  17. #Uranus and #Neptune should be more than 60% rock. For decades, elementary students learned the same tale of the #SolarSystem: first come rocky terrestrial planets such as #Earth, followed by gas giants such as #Jupiter and #ice giants such as Neptune. “We really don’t know what these #planets 🪐 are made of.” science.org/content/article/ur

    #Astronomy

  18. #Uranus and #Neptune should be more than 60% rock. For decades, elementary students learned the same tale of the #SolarSystem: first come rocky terrestrial planets such as #Earth, followed by gas giants such as #Jupiter and #ice giants such as Neptune. “We really don’t know what these #planets 🪐 are made of.” science.org/content/article/ur

    #Astronomy

  19. Europlanet is an organisation for all kinds of planetary science people in Europe, including academia, industry, government and amateurs. You can follow their video account at:

    ➡️ @europlanet_media

    (Don't worry if it looks blank, that just means no one from your server follows it yet. If you follow the account, the videos will start gradually showing up on your server too.)

    #FeaturedPeerTube #PlanetaryScience #Science #Space #Astrophysics #SolarSystem #PeerTube

  20. Europlanet is an organisation for all kinds of planetary science people in Europe, including academia, industry, government and amateurs. You can follow their video account at:

    ➡️ @europlanet_media

    (Don't worry if it looks blank, that just means no one from your server follows it yet. If you follow the account, the videos will start gradually showing up on your server too.)

    #FeaturedPeerTube #PlanetaryScience #Science #Space #Astrophysics #SolarSystem #PeerTube

  21. 2026-07-09 12:00:00 UTC (Delta: 2026-07-02)

    SATURN
    - Distance (km): 1,399,578,651.16 km (-17,377,668.06 km)
    - Distance (AU): 9.36 (-0.12)
    - Light travel time: 1 h 17 min 48.49 s (-57.97 s)
    - Orbital speed: 9.73 km/s (+0.00 km/s)

    Image: Saturn Rings Artist Concept
    Credit: NASA/JPL

    #Saturn #Space #SolarSystem

  22. 2026-07-09 12:00:00 UTC (Delta: 2026-07-02)

    SATURN
    - Distance (km): 1,399,578,651.16 km (-17,377,668.06 km)
    - Distance (AU): 9.36 (-0.12)
    - Light travel time: 1 h 17 min 48.49 s (-57.97 s)
    - Orbital speed: 9.73 km/s (+0.00 km/s)

    Image: Saturn Rings Artist Concept
    Credit: NASA/JPL

    #Saturn #Space #SolarSystem

  23. Witness Neptune’s deep blue emerge from the void through the lens of Voyager 2 — humanity’s only close-up look at the eighth planet, captured in 1989 as the spacecraft raced past on its way to interstellar space. 🔵🚀

    #space #neptune #voyager2 #nasa #astronomy #universe #cosmos #solarsystem

    @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] #space #science #nasa #astronomy
  24. Witness Neptune’s deep blue emerge from the void through the lens of Voyager 2 — humanity’s only close-up look at the eighth planet, captured in 1989 as the spacecraft raced past on its way to interstellar space. 🔵🚀

    #space #neptune #voyager2 #nasa #astronomy #universe #cosmos #solarsystem

    @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] #space #science #nasa #astronomy
  25. 2026-07-08 12:00:00 UTC (Delta: 2026-07-01)

    JUPITER
    - Distance (km): 935,251,972.32 km (+5,375,188.62 km)
    - Distance (AU): 6.25 (+0.04)
    - Light travel time: 51 min 59.66 s (+17.93 s)
    - Orbital speed: 12.87 km/s (-0.01 km/s)

    Image: Jupiter Swirling Storms
    Credit: NASA/JPL

    #Jupiter #Space #SolarSystem

  26. 2026-07-08 12:00:00 UTC (Delta: 2026-07-01)

    JUPITER
    - Distance (km): 935,251,972.32 km (+5,375,188.62 km)
    - Distance (AU): 6.25 (+0.04)
    - Light travel time: 51 min 59.66 s (+17.93 s)
    - Orbital speed: 12.87 km/s (-0.01 km/s)

    Image: Jupiter Swirling Storms
    Credit: NASA/JPL

    #Jupiter #Space #SolarSystem

  27. 2026-07-07 12:00:00 UTC (Delta: 2026-06-30)

    VENUS
    - Distance (km): 148,628,591.48 km (-7,986,138.27 km)
    - Distance (AU): 0.99 (-0.05)
    - Light travel time: 8 min 15.77 s (-26.64 s)
    - Orbital speed: 35.04 km/s (-0.05 km/s)

    Image: Pioneer-Venus Image (Crescent)
    Credit: ARC

    #Venus #Space #SolarSystem

  28. 2026-07-07 12:00:00 UTC (Delta: 2026-06-30)

    VENUS
    - Distance (km): 148,628,591.48 km (-7,986,138.27 km)
    - Distance (AU): 0.99 (-0.05)
    - Light travel time: 8 min 15.77 s (-26.64 s)
    - Orbital speed: 35.04 km/s (-0.05 km/s)

    Image: Pioneer-Venus Image (Crescent)
    Credit: ARC

    #Venus #Space #SolarSystem

  29. New Study Suggests Earth May Survive Sun's Expansion in 5 Billion Years

    📰 Original title: Good News! Turns Out the Earth Will Never Be Swallowed by the Sun

    🤖 IA: It's clickbait ⚠️
    👥 Users: It's clickbait ⚠️

    View full AI summary en.killbait.com/new-study-sugg

    #astronomy #solarsystem #earth'sfate

  30. Astronomers find biggest super-puff planets yet that are lighter than cotton candy https://
    phys.org/news/2026-06-astronomers-biggest-super-puff-planets.html 🪐
    #Exoplanet #Exoplanets #AlienWorlds #AlienLife #Extraterrestrials #Space #Science #SolarSystem #Astrobiology

  31. Astronomers find biggest super-puff planets yet that are lighter than cotton candy https://
    phys.org/news/2026-06-astronomers-biggest-super-puff-planets.html 🪐
    #Exoplanet #Exoplanets #AlienWorlds #AlienLife #Extraterrestrials #Space #Science #SolarSystem #Astrobiology

  32. 2026-07-06 12:00:00 UTC (Delta: 2026-06-29)

    MERCURY
    - Distance (km): 86,276,692.96 km (-7,737,334.89 km)
    - Distance (AU): 0.58 (-0.05)
    - Light travel time: 4 min 47.79 s (-25.81 s)
    - Orbital speed: 39.24 km/s (+0.33 km/s)

    Image: Digital Elevation Model of Mercury Northern Hemisphere
    Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

    #Mercury #Space #SolarSystem

  33. 2026-07-06 12:00:00 UTC (Delta: 2026-06-29)

    MERCURY
    - Distance (km): 86,276,692.96 km (-7,737,334.89 km)
    - Distance (AU): 0.58 (-0.05)
    - Light travel time: 4 min 47.79 s (-25.81 s)
    - Orbital speed: 39.24 km/s (+0.33 km/s)

    Image: Digital Elevation Model of Mercury Northern Hemisphere
    Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

    #Mercury #Space #SolarSystem

  34. 2026-07-05 12:00:00 UTC (Delta: 2026-06-28)

    PLUTO [ *1930 +2006 ]
    - Distance (km): 5,176,490,347.52 km (-6,628,721.72 km)
    - Distance (AU): 34.60 (-0.04)
    - Light travel time: 4 h 47 min 46.91 s (-22.11 s)
    - Orbital speed: 5.25 km/s (+0.01 km/s)

    Image: Pluto in True Color
    Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

    #Pluto #Space #SolarSystem

  35. 2026-07-05 12:00:00 UTC (Delta: 2026-06-28)

    PLUTO [ *1930 +2006 ]
    - Distance (km): 5,176,490,347.52 km (-6,628,721.72 km)
    - Distance (AU): 34.60 (-0.04)
    - Light travel time: 4 h 47 min 46.91 s (-22.11 s)
    - Orbital speed: 5.25 km/s (+0.01 km/s)

    Image: Pluto in True Color
    Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

    #Pluto #Space #SolarSystem

  36. 2026-07-04 12:00:00 UTC (Delta: 2026-06-27)

    NEPTUNE
    - Distance (km): 4,445,975,289.57 km (-17,549,042.40 km)
    - Distance (AU): 29.72 (-0.12)
    - Light travel time: 4 h 7 min 10.18 s (-58.54 s)
    - Orbital speed: 5.47 km/s (+0.00 km/s)

    Image: Neptune Rings
    Credit: NASA/JPL

    #Neptune #Space #SolarSystem

  37. 2026-07-04 12:00:00 UTC (Delta: 2026-06-27)

    NEPTUNE
    - Distance (km): 4,445,975,289.57 km (-17,549,042.40 km)
    - Distance (AU): 29.72 (-0.12)
    - Light travel time: 4 h 7 min 10.18 s (-58.54 s)
    - Orbital speed: 5.47 km/s (+0.00 km/s)

    Image: Neptune Rings
    Credit: NASA/JPL

    #Neptune #Space #SolarSystem