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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 ...
Its orbit revealed that it was a new planet, Uranus, the first ever discovered telescopically. [20] Giuseppe Piazzi discovered Ceres in 1801, a small world between Mars and Jupiter. It was considered another planet, but after subsequent discoveries of other small worlds in the same region, it and the others were eventually reclassified as ...
4 October 1957 First Earth orbiter [1] [2] Sputnik 2: 3 November 1957 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
These are lists of planets.A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a protoplanetary disk.
This list of exoplanets discovered in 2024 is a list of confirmed exoplanets that ... 1.4 Pulsar planet located in the globular ... 561.4 ± 2.3 0.969 +0.154 −0.104 ...
A Belgian-led team made the discovery using both space- and ground-based telescopes, spotting the planets as they passed in front of the red dwarf star known as TRAPPIST-1.
An artist's rendition of Kepler-62f, a potentially habitable exoplanet discovered using data transmitted by the Kepler space telescope. The list of exoplanets detected by the Kepler space telescope contains bodies with a wide variety of properties, with significant ranges in orbital distances, masses, radii, composition, habitability, and host star type.
Planet X and another object dubbed "Planet Y," are among 13 "extreme trans-Neptunian objects" (ETNOs) orbiting the sun at great distances, according to a report in Space, which quoted a new ...