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Most of the stars that you see in the night sky aren’t alone — they consist of two stars or more. They’re so far away, though, that their light merges into a single pinpoint.
For an 18th-century astronomer, the quickest way to fame and fortune was discovering comets — the big iceballs that grow long, beautiful tails when they come close to the Sun.
A planet in the heart of M13, the Hercules Cluster, would never see the dark of night. The cluster contains hundreds of thousands of stars, all packed into a ball only about 150 light-years across.
We live in a fairly lonely region of the Milky Way galaxy. The nearest star system is more than four light-years away, and only a handful of stars lie within 10 light-years. Partly because of that, only a few bright stars adorn the night sky.
BERKELEY (KCBS) — Results of a new study reveal that tule fog–the dense ground fog that blankets the Central Valley during the winter months—has been steadily decreasing for the last 30 years.
The hinterlands of our solar system are tough to study. The objects beyond the realm of the planets are so far and small that it’s difficult to even find them.
The National Weather Service issued a winter weather advisory in effect until 2 p.m Tuesday as a winter storm dusts light to moderate snow across the Lake Tahoe Basin.
Four of the five planets that are easily visible to the unaided eye arc across the sky shortly after sunset the next few evenings. One of the planets sinks from sight quickly, but the other three stick around for a while.
Mercury has been shrink-wrapped. Observations by an orbiting spacecraft suggest that the Sun’s closest planet has probably shrunk by several miles since it was born. That’s wrinkled and stretched its surface like shrink wrapping on a basketball.