Other Companions of Earth
Earth has a second companion, asteroid 3753 Cruithne, about 5 km across, in a peculiar type of orbital resonance called an overlapping horseshoe. It is probably only a temporary liaison. Several other small objects have been found in similar orbits. Although these objects are in 1:1 orbital resonance, they are not Earth trojans because each of them does not librate around a definite Sun–Earth Lagrangian point, either L4 or L5.
Read more about this topic: Earth Trojan Asteroid
Famous quotes containing the words companions and/or earth:
“To coöperate in the highest as well as the lowest sense, means to get our living together. I heard it proposed lately that two young men should travel together over the world, the one without money, earning his means as he went, before the mast and behind the plow, the other carrying a bill of exchange in his pocket. It was easy to see that they could not long be companions or coöperate, since one would not operate at all. They would part at the first interesting crisis in their adventures.”
—Henry David Thoreau (1817–1862)
“The world is upheld by the veracity of good men: they make the earth wholesome. They who lived with them found life glad and nutritious. Life is sweet and tolerable only in our belief in such society.”
—Ralph Waldo Emerson (1803–1882)