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File: The Sun by the Atmospheric Imaging Assembly of NASA's Solar Dynamics Observatory - 20100819.jpg
Sun. The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.
Early color image of an aurora by a human from space. [53] [54] [image needed] 1977 KH-11: First real-time satellite imagery. [55] September 18, 1977 Voyager 1: First full-disk picture of both Earth and the Moon. [35] February 14, 1990 The Pale Blue Dot is the first image of Earth from beyond all of the other Solar System planets.
The Southern Ring Nebula looks as though a bomb dropped into an ocean, tsunami waves surging away, into the darkness. Cosmic light, presented in the colors of a lapis stone, seems to fill a gaping ...
The Parker Solar Probe(PSP; previously Solar Probe, Solar Probe Plusor Solar Probe+)[6]is a NASAspace probelaunched in 2018 with the mission of making observations of the outer coronaof the Sun. It will approach to within 9.86 solar radii(6.9 million km or 4.3 million miles)[7][8]from the center of the Sun, and by 2025 will travel, at closest ...
The Hubble Space Telescope cannot observe Mercury at all, due to safety procedures that prevent its pointing too close to the Sun. [142] Because the shift of 0.15 revolutions of Earth in a Mercurian year makes up a seven-Mercurian-year cycle (0.15 × 7 ≈ 1.0), in the seventh Mercurian year, Mercury follows almost exactly (earlier by 7 days ...
ʻOumuamua is a small object estimated to be between 100 and 1,000 metres (300 and 3,000 ft) long, with its width and thickness both estimated between 35 and 167 metres (115 and 548 ft). [ 13] It has a red color, like objects in the outer Solar System.
720,000 km/h (450,000 mi/h) [ 10] Orbital period. ~230 million years [ 10] The Solar System[ d] is the gravitationally bound system of the Sun and the objects that orbit it. [ 11] It was formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.