It's not a spare moon of ours, exactly, but Earth does have a sort of gravitational buddy out there, in the mellifluously named 3753 Cruithne. It orbits the sun, just like us, and is locked with Earth in what scientists call orbital resonance.
A new computer model of our sun's magnetic field suggests the shape of our solar system's heliosphere is stranger than we ever thought.
This image isn't a close-up from the garden, but an active area of strong magnetic fields on the sun's chromosphere.
Our sun will not explode as a powerful supernova when it eventually runs out of fuel, but that doesn't mean there won't be fireworks.
On Earth, the sun usually looks like an orange blob or a yellow blob, depending on the time of day. Fascinating, sure, but - a blob. If you want to take the boring out of the sun, you need NASA images. Amy explains how the agency gets its cool shots.
Jan. 19, 2015, was a red letter day for NASA's Solar Dynamics Observatory -- one of its instruments, having continually stared at the sun for 5 years, captured its 100 millionth observation of our nearest star.
A machine on Earth capable of recreating the conditions inside the sun's heart is helping scientists study how iron behaves at mind-boggling temperatures. The results of the experiment, so far, have defied expectations and just might help settle a long-standing solar puzzle.
NASA's Nuclear Spectroscopic Telescope Array has turned its gaze from distant black holes and focused on our sun, producing the most sensitive measurement of high-energy solar X-rays ever achieved.
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