The moon is at its best for observing when it is around its first-quarter phase.
The first day of Spring began with some dazzle in Europe and the Arctic with a solar eclipse.
This week, the moon will completely cover the disk of the sun, creating a solar eclipse that only a small part of the world can see.
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 ravaged star, having survived its partner's supernova explosion, is being flung out of the Milky Way at record speeds.
This image isn't a close-up from the garden, but an active area of strong magnetic fields on the sun's chromosphere.
Astronomers have discovered an out-of-place supermassive black hole -- 12 billion times more massive than the sun -- that inexplicably formed when the universe was less than 900 million years old.
Amateur astronomers gazing at Mars discovered gigantic plumes soaring more than 125 miles above the planet’s surface, a phenomenon that so far defies explanation.
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