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A red supergiant star orbited by a smaller B-type main-sequence star with a radius estimated between 13 [49] and 25 R ☉. [50] Widely recognised as being among the largest known stars. [ 19 ] Another estimate give a radius of 660 R ☉ [ 23 ] based on the Gaia DR3 distance of 1 kpc.
For the giant planets, the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure. [ 11 ] Because Sedna and 2002 MS 4 have no known moons, directly determining their mass is impossible without sending a probe (estimated to be from 1.7x10 21 to 6.1×10 21 kg for Sedna [ 12 ] ).
The Sun, planets, moons and dwarf planets (true color, size to scale, distances not to scale) The following outline is provided as an overview of and topical guide to the Solar System: Solar System – gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly.
Euler diagram showing the types of bodies orbiting the Sun. The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun.Most named objects in this list have a diameter of 500 km or more.
Six planets will align again on Aug. 28, Jan. 18., 2025 and Aug. 29, 2025. Seven planets will align on Feb. 28, 2025. USA TODAY's Janet Loehrke contributed to this story.
A giant planet, sometimes referred to as a jovian planet (Jove being another name for the Roman god Jupiter), is a diverse type of planet much larger than Earth. Giant planets are usually primarily composed of low- boiling point materials ( volatiles ), rather than rock or other solid matter, but massive solid planets can also exist.
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