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A hypothetical planet-sized Earth trojan the size of Mars, given the name Theia, is thought by proponents of the giant-impact hypothesis to be the origin of the Moon.The hypothesis states that the Moon formed after Earth and Theia collided, [10] showering material from the two planets into space.
There are 28 known Neptunian trojans, [11] but the large Neptunian trojans are expected to outnumber the large Jovian trojans by an order of magnitude. [12] [13] 2010 TK 7 was confirmed to be the first known Earth trojan in 2011. It is located in the L 4 Lagrangian point, which lies ahead of the Earth.
Position of 2010 TK 7 relative to Earth in 2011 Effective potential plot showing Earth's Lagrangian points (not to scale); contours around L 4 and L 5 represent tadpole loop paths. Because Earth trojans share Earth's orbit and have little gravity of their own, less energy might be needed to reach them than the Moon, even though they are much ...
Minor planets include asteroids (near-Earth objects, Earth trojans, Mars trojans, Mars-crossers, main-belt asteroids and Jupiter trojans), as well as distant minor planets (Uranus trojans, Neptune trojans, centaurs and trans-Neptunian objects), most of which reside in the Kuiper belt and the scattered disc.
Here are 10 interesting facts about Earth Day. Earth Day was created by a senator. Gaylord Nelson, a Democratic senator from Wisconsin, was growing increasingly concerned over the state of the U.S ...
Earth trojan; 0–9 (614689) 2020 XL5 (706765) 2010 TK7 This page was last edited on 25 December 2017, at 23:49 (UTC). Text is available under the Creative Commons ...
Earth Day Facts (Jessica Zaccaria / Getty Images/iStockphoto) A 2015 study estimated that there are roughly 3 trillion trees on earth, give or take a few million. Since there are around 8 billion ...
Earth Day fun facts for kids and adults.