New image of the Tycho supernova remnant from the Chandra X-ray Observatory.

Thanks to abnormal weather patterns in the upper atmosphere over Antarctica, this year's ozone hole is the smallest since the ozone hole was 1st observed in 1982.

Get up before dawn to see the moon and the starry figure of Leo the Lion in the eastern sky. Then, as darkness gives way to dawn, use the lit side of the waning lunar crescent to find the planet Mars near the sunrise horizon.

For a brief time in 1976, it seemed as if NASA's Viking landers had found microbes on Mars! Those results have been vigorously disputed in the years since, but the original experiment's principal investigator, Gilbert Levin, still maintains they really did detect Martian microbes.

The new rifts appeared soon after last year’s major calving of iceberg B46, which is about 3 times the size of New York's Manhattan island. Satellite monitoring suggests a new iceberg of similar proportions will soon be calved.

Charts and insights about this week's Orionid meteor shower from astronomer Guy Ottewell.

A new study from Brown University suggests that different deposits of ice at the moon's south pole not only originated from different sources, but also vary greatly in age.

Hubble Telescope view of a spiral galaxy - called NGC 3717 - oriented sideways.

Can you see Mercury and Venus now, in the western twilight after sunset? It depends on how far north or south you reside on the Earth's globe.

Astronomers in Poland have just published the 1st peer-reviewed paper on the 2nd interstellar visitor, now officially labeled as a comet, 2I/Borisov. Plus check out the new Hubble Space Telescope image of this object.