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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 later that year.
Some may have escaped the Solar System altogether to become free-floating planets, whereas others would be orbiting in a halo around the Solar System, with orbital periods of millions of years. This halo would lie at between 1,000 and 10,000 AU (150 and 1,500 billion km; 93 and 930 billion mi) from the Sun, or between a third and a thirtieth ...
Former planets of the Solar System Former planet Discovery Removal Current status Notes The Morning Star: Antiquity: Antiquity: Aspects of Venus "Phosphorus", the Morning Star of Greek antiquity (Eosphorus, the Dawn-Bringer; called "Lucifer" by the Romans), and "Hesperus", the Evening Star (called "Vesper" by the Romans), were later identified as a single planet, Venus (Aphrodite).
1.83±0.05[14] 1.3[2] Sedna(minor-planet designation: 90377 Sedna) is a dwarf planetin the outermost reaches of the Solar System, orbiting the Sun beyond the orbit of Neptune. Discovered in 2003, the planetoid's surface is one of the reddestknown among Solar System bodies. Spectroscopyhas revealed Sedna's surface to be mostly a mixture of the ...
The "tenth planet" in the title makes reference to a fictional lost planet in Earth's Solar System; at the time of production, the Solar System was generally held to consist of nine planets, prior to the redesignation of Pluto as a minor planet. The Tenth Planet is an incomplete Doctor Who serial – one of many serials that were affected by ...
The period, inclination and eccentricity of Gonggong's orbit are all rather extreme compared to other large bodies in the Solar System. Among likely dwarf planets, its period is the third-longest, at 554 years compared to 558 years for Eris and the ca. 11,400 years of Sedna. Its 31° inclination is second, after 44° for Eris, and its 0.50 ...
2018 AG37 is a distant trans-Neptunian object and centaur that was discovered 132.2 ± 1.5 AU (19.78 ± 0.22 billion km) from the Sun, [8] farther than any other currently observable known object in the Solar System. [3] [9] Imaged in January 2018 during a search for the hypothetical Planet Nine, [10] the confirmation of this object was ...
In the distant future, the Solar System is a ravaged battlefield, and mighty starship armadas are the tools of our destruction. Using a previously unknown tenth planet orbiting the Solar System as its staging ground, an alien force plans on conquering Earth and destroying anything that gets in its way.