ISS logo patch 20th anniversary

The International Space Station turns 20!

Nov. 10, 2020

The International Space Station turned 20 years old this month! 20 years of orbiting our planet. 20 years with a constant human presence in space. 20 years of studying how the human body responds to microgravity. 20 years of cutting edge science and research. 20 years of exploring the universe...

Two images of the full moon with a blue filter overlay and the jack-o-lantern image is a photo of the Sun taken by NASA's Solar Dynamics Observatory in 2014.

A Blue Moon on Halloween!

Oct. 31, 2020

A Blue Moon on Halloween! YAAAAAS! Don't have to get superstitious or anything, but what is a blue moon anyway? All it means is two full moons have occured in the same calendar month. The last one happened in March 2018. Halloween is unique too. It's a cross-quarter day that...

stration with candy corn

No tricks this week, only celestial treats!

Oct. 20, 2020

No tricks this week, only celestial treats! The Orionid meteor shower will be modest this year, but should be visible in the early morning hours on Wednesday and Thursday. Also, on Wednesday the waxing crescent Moon shines brightly in the early evening in a line with Saturn and Jupiter. Whereas...

Different images of the Sun in various wavelengths from the Solar Dynamics Observatory

National Solar Week

Oct. 13, 2020

Celebrate NASA's Solar Week with us! Learn more about the Sun-Earth connection with lessons, games, and hands-on activities for all ages. Got a burning question? Ask leading solar scientists your questions about our nearest star, the Sun!

Global photo of Mars from NASA JPL


Oct. 6, 2020

Tonight is all about Mars! Go fishing for the Red Planet in the constellation of Pisces. Mars is only 38.6 million miles away from us this evening and won’t be as close until 2035. Next week, it’ll be at opposition, meaning directly opposite of the Sun from our Earthly perspective...

Photo collage of Jupiter, Saturn and the asterism of the Teapot in Sagittarius

Jupiter & Saturn

Sept. 29, 2020

The year is rolling right along and for the next few months Jupiter and Saturn are perfectly placed in our evening sky. You can’t miss them — just head outside after dinner and look to the south. You’ll see them to the left (east) of the Teapot asterism. To the...

Pic for Autumnal Equinox Golden Aspen leaf amongst pinecones and sticks

The Autumnal Equinox

Sept. 22, 2020

This year has been a blur, the days and weeks seem to blend together. But, today, is the Autumnal Equinox, an official marker in the calendar as we make another lap around the Sun. Our nights and days will be almost equal in duration with the Sun directly over the...

View from web app Stellarium of the horizon and early morning sky - Venus in constellation of cancer, can see Leo rising, and other constellations

Venus - The Morning Star

Sept. 15, 2020

Early risers grab your binos and look to the east this week. Venus is in the constellation of Cancer and paired nicely with the Beehive Cluster (M44). So, even though we're saying goodbye to summer, take heart, there are still bees buzzin' in the skies. Graphic credit:

Image from the LRO Diviner tool showing the temperatures on the Moon represented in Red for warm and blue for cold surface temps

Temperature Extremes

Sept. 8, 2020

How’s everyone feeling about extreme temperature drops? With a sudden slide into fall in Boulder, we thought about the extreme temperature fluctuations on our Moon. Daytime temps on the Moon hit 250 degrees Fahrenheit and nighttimes fall to a bone chilling -208 degrees (the poles get even colder, BRRR!). Find...

Screen grab from Sky Safari Pro app with Moon and Mars in the sky on September 5, 2020

Moon and Mars!

Sept. 5, 2020

TONIGHT ONLY! Go outside around 11pm and look to the East. You'll see the waning gibbous Moon and Mars VERY close together. In fact, they're less than a degree apart, at least from our view on Earth. In actuality, the Moon is about 240,000 miles away, whereas Mars is 45...