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  2. Eris (dwarf planet) - Wikipedia

    en.wikipedia.org/wiki/Eris_(dwarf_planet)

    Eris (minor-planet designation: 136199 Eris) is the most massive and second-largest known dwarf planet in the Solar System. [22] It is a trans-Neptunian object (TNO) in the scattered disk and has a high-eccentricity orbit. Eris was discovered in January 2005 by a Palomar Observatory–based team led by Mike Brown and verified

  3. Timeline of discovery of Solar System planets and their moons

    en.wikipedia.org/wiki/Timeline_of_discovery_of...

    The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...

  4. Timeline of Solar System astronomy - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_Solar_System...

    2005 – M. Brown, C. Trujillo, and D. Rabinowitz discover Eris, a TNO more massive than Pluto, [229] and later, by other team led by Brown, also its moon, Dysnomia. [230] Eris was first imaged in 2003, and is the most massive object discovered in the Solar System since Neptune's moon Triton in 1846.

  5. List of gravitationally rounded objects of the Solar System

    en.wikipedia.org/wiki/List_of_gravitationally...

    According to the IAU's explicit count, there are eight planets in the Solar System; four terrestrial planets (Mercury, Venus, Earth, and Mars) and four giant planets, which can be divided further into two gas giants (Jupiter and Saturn) and two ice giants (Uranus and Neptune). When excluding the Sun, the four giant planets account for more than ...

  6. Scientists discern internal structure of mysterious dwarf ...

    www.aol.com/news/scientists-discern-internal...

    Dwarf planet Eris, similar in size to its better-known cosmic cousin Pluto, has remained an enigma since being discovered in 2005 lurking in the solar system's far reaches. While Pluto was ...

  7. Timeline of Solar System exploration - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_Solar_System...

    move to sidebar hide (Top) 1 1950s. 2 1960s. 3 1970s. ... discovered Van Allen radiation belts [5] ... First Venus lander and the first spacecraft to "soft" land on ...

  8. Discovery and exploration of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Discovery_and_exploration...

    In 1992, the first evidence of a planetary system other than our own was discovered, orbiting the pulsar PSR B1257+12. Three years later, 51 Pegasi b, the first extrasolar planet around a Sunlike star, was discovered. NASA announced in March 2022 that the number of discovered exoplanets reached 5,000, of several types and sizes. [45]

  9. Venus and Mercury Are Both Retrograde – Here’s What To Expect

    www.aol.com/venus-mercury-both-retrograde-expect...

    On August 23, 2023, Venus retrograde and Mercury retrograde will join forces for a wild and crazy finale to summer. As you look at your calendar to lock in your last-minute summer plans, there are ...