Sign Up for Our Amazing Newsletter!
A daily update by email. Science news, great photos, sky alerts.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
See it! Moon sweeps past Venus and Mars
As 2017 opens, the young moon is sweeping past dazzling Venus in the west after sunset. Mars is there, too, and, for those with optical aid, Neptune! Photos here.
January 3, 2017
Close and far moons in 2017
We list the 13 lunar perigees (close moons) and 13 lunar apogees (far moons) for the year 2017, plus share a secret on the intriguing cycle of close and far moons.
January 2, 2017
How to find Geminids’ radiant point
Best way to find the Geminid radiant is to see a meteor! Then trace its path backwards. But what if you want to find the radiant before seeing a meteor?
December 11, 2016
See it! Moon sweeps past Venus
The moon passed Venus Friday evening, but there's more to come. Wonderful photos here! Thanks to all who submitted. Keep watching this post for more photos.
December 4, 2016
How long to orbit Milky Way’s center?
One journey of our sun and planets around the center of our Milky Way galaxy is sometimes called a cosmic year. That's approximately 225-250 million Earth-years.
November 28, 2016
See it! Moon sweeps past Jupiter
In late November 2016, the waning moon took aim on Jupiter in the predawn sky. It swept closest to it on the morning of November 25. Photos from around the world!
November 25, 2016
Thanksgiving evening
There's the sky we can see, and, beyond that, a whole universe of objects we can't see with the eye alone. Guy Ottewell gives you a way to project outward on this Thanksgiving evening.
November 24, 2016
Last quarter moon 3rd of 4 this season
Usually there are only 3 last quarter moons in a season. The November 21, 2016 last quarter moon, though, counts as the 3rd of four.
November 21, 2016
5 keys to enjoying the closest supermoon
The closest full moon since 1948 is coming up this weekend. When should you watch? What should you watch for? Are supermoons hype? Here's all you need to know.
November 12, 2016
Farthest moon of 2016
The October 31 moon is farthest for this year. In about 2 weeks, we'll have the closest moon since 1948. It'll be a full moon and a supermoon.
October 31, 2016
