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

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

    [4] [5] Earth was never formally 'discovered' because it was never an unrecognized entity by humans. However, its shared identity with other bodies as a "planet" is a historically recent discovery. The Earth's position in the Solar System was correctly described in the heliocentric model proposed by Aristarchus of Samos. [6] Moon: Earth I

  3. List of natural satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_natural_satellites

    Irregular moons are probably minor planets that have been captured from surrounding space. Most irregular moons are less than 10 kilometres (6.2 mi) in diameter. The earliest published discovery of a moon other than Earth's was by Galileo Galilei, who discovered the four Galilean moons orbiting Jupiter in 1610. Over the following three ...

  4. Timeline of artificial satellites and space probes - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_artificial...

    Vanguard 2. Measured cloud cover. First attempted photo of Earth from a satellite; precession motion resulted in difficulty interpreting data (see first images of Earth from space). [2] 10.8 kg (23.7 lb) March 3 US: Pioneer 4: Juno II: Success: Passed within 60,030 km (37,300 mi) of the Moon into a heliocentric orbit, returning excellent ...

  5. Astronomers discover 3 previously unknown moons orbiting ...

    www.aol.com/news/astronomers-discover-3...

    Astronomers have discovered a new moon orbiting Uranus — the ... with Voyager 2 in the 1980s. The three moons were announced on February 23 by the International Astronomical Union’s Minor ...

  6. 20 new moons were discovered around Saturn - AOL

    www.aol.com/news/20-moons-were-discovered-around...

    The new discovery increases the moons orbiting the "jewel of our solar system" to 82, surpassing Jupiter

  7. Timeline of Solar System exploration - Wikipedia

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

    Earth orbiter, first animal in orbit, a dog named Laika [2] [3] [4] Explorer 1: 1 February 1958 Earth orbiter; discovered Van Allen radiation belts [5] Vanguard 1: 17 March 1958 Earth orbiter; oldest spacecraft still in Earth orbit [6] Luna 1: 2 January 1959 First lunar flyby (attempted lunar impact?); first artificial satellite in heliocentric ...

  8. Pioneer 11 - Wikipedia

    en.wikipedia.org/wiki/Pioneer_11

    The object was tentatively identified as Epimetheus, a moon discovered the previous day from Pioneer ' s imaging, and suspected from earlier observations by Earth-based telescopes. After the Voyager flybys, it became known that there are two similarly sized moons (Epimetheus and Janus ) in the same orbit, so there is some uncertainty about ...

  9. Astronomers Find New Mysterious Moons in Our Solar System ...

    www.aol.com/astronomers-mysterious-moons-solar...

    There are 293 confirmed moons in our cosmic neighborhood. By studying these worlds, astronomers hope to learn about ancient asteroid collisions, space volcanoes, and the origins of life itself.