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Astronomy

Looking for an astronomy fix? We have you covered.

Interested in stargazing? Visit Sommers-Bausch Observatory (next to Fiske) --- the observatory provides free open houses throughout the year.

Graphic from Stellarium showing the southwestern horizon with trees and the Moon and Jupiter close together
Moon and Jupiter

Jan. 25, 2023

The waxing crescent Moon is hanging out with Jupiter tonight in the southwestern sky. Should be a pretty pairing! Graphic credit: SkySafari app

Read more about Moon and Jupiter

Graphic from Stellarium of the southeastern sky showing the constellation of Scorpius rising above the horizon and the Moon next to the star Antares.
Moon and Antares

Jan. 18, 2023

Winter can feel like a long season, but not to worry! If you’re an early riser, you’ll spot the Moon next to Antares this morning before dawn. Antares is the heart of the Scorpion, one of summer’s most recognizable constellations. The stars rise 4 minutes earlier every day, so rest...

Read more about Moon and Antares

NASA ISS photo of Sunset over the Gulf of Mexico. Sun in view and limb of Earth. Image Credit NASA/Terry Virts
Earth at Perihelion

Jan. 4, 2023

Our lovely big, blue marble is at its closest point to the Sun this year…a mere 91 million miles away. Happy Perihelion Earthlings! Photo credit: NASA/Terry Virts

Read more about Earth at Perihelion

Graphic from Stellarium showing the southwestern horizon with trees and the crescent Moon with Mercury to the upper right and Venus lower right
Celestial Gifts

Dec. 24, 2022

Look to the southwest shortly after sunset for some shimmering celestial gifts. The thin crescent Moon is nestled in with brilliant Venus and glittering Mercury. Binoculars will make the sight an extra delight! Graphic credit: Stellarium

Read more about Celestial Gifts

Two graphics from Stellarium showing the summer solstice on the top where the sun is highest in the south and the winter solstice on the bottom where the sun is low on the southern horizon
Winter Solstice

Dec. 21, 2022

Welcome to the longest night of the year - the Winter Solstice! Winter officially begins for the Northern Hemisphere at 2:48 MST. The axial tilt of our Earth causes the Sun to be at its farthest south (lowest) place in the sky. Not to worry though, tomorrow the days will...

Read more about Winter Solstice

Graphic from Sky Safari showing the northeastern horizon with trees and the radiant of the geminid meteor shower against the pretty star filled sky
Geminid Meteor shower

Dec. 13, 2022

Despite the chill in the air, December provides one of the best meteor showers of the year — the Geminids! This meteor shower is particularly interesting because the source of the shower actually comes from an asteroid (3200 Phaethon), instead of a comet. The shower will be fairly active in...

Read more about Geminid Meteor shower

Graphic from Sky Safari showing Mars being occulted by the Moon, craters in view against the blackness of space
Moon occults Mars

Dec. 7, 2022

Astronomy alert! Mars is at opposition tonight AND the Full Moon occults it! Have your telescope ready to start observing at 7pm. Watch as Mars and the Moon get progressively closer. Mars will slip behind the lunar limb at approximately 7:44 MST. Tune in 64 minutes later to watch Mars...

Read more about Moon occults Mars

Graphic from Sky Safari app showing the horizon with the Moon in between the Pleiades and the Hyades, Mars is in view too
Moon & Two Clusters

Dec. 6, 2022

Let the almost full Moon be your guide this evening to the two prettiest clusters of the season — the large and dispersed Hyades is below the Moon and the sparkly Pleiades is above. Graphic credit: SkySafari app

Read more about Moon & Two Clusters

Graphic from Stellarium showing the Moon and Jupiter very close together in the souther sky
Moon and Jupiter

Dec. 1, 2022

The Moon is getting cozy with Jupiter tonight! It’ll be a gorgeous sight with binoculars. Plan the rest of the month's observing fun with Sky & Telescope: The Essential Guide to Astronomy . Graphic credit: Stellarium

Read more about Moon and Jupiter

Graphic from Sky Safari app showing the Moon below the planet Saturn, Jupiter and Neptune are also visible in this park setting from Earth's vantage point
Moon and Saturn

Nov. 28, 2022

The beautiful waxing crescent Moon is just below Saturn this evening. Catch the celestial magic before the two sink below the southwestern horizon. Graphic credit: SkySafari app

Read more about Moon and Saturn

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More Astronomy Resources

Photo of the Andromeda galaxy by Stephan Abraas Stargate Observatory in Canon City

Astronomy-related websites

Enjoy our favorite astronomy-related websites for up-to-date information on what’s up in the sky, NASA news, beautiful astronomy images, eclipses, satellites, plus more.

  • Astronomy magazine - The Sky this Week
  • Astronomy Picture of the Day - Each day a different image or photograph of our fascinating universe
  • Heavens-Above - Information about artificial satellites, ISS, HST, and Iridium flares
  • International Dark Sky Association - Videos about Light Pollution
  • NASA - News and mission information
  • NASA - eClips: Bringing STEM alive through NASA real-world connections and a Special Edition newsletter for Earth Day
  • NASA Jet Propulsion Laboratory videos - What’s Up, Mars Report, etc.
  • NASA Eclipse Information - Eclipses of the Sun and Moon
  • Origin of the Constellations from the International Astronomical Union 
  • Sky & Telescope magazine - This Week’s Sky at a Glance
Losing the Dark still image from film of bright sky, trees and buildings

Learn about light pollution

You can learn more about light pollution and how you can help save our starry skies watch "Losing the Dark" from the International Dark Sky Association and Loch Ness Productions. Starry skies are a vanishing treasure because light pollution is washing away our view of the cosmos. It not only threatens astronomy but also disrupts wildlife, and affects human health. The glows over cities and towns — seen so clearly from space — are testament to the billions of dollars spent in wasted energy by lighting up the sky. The video introduces and illustrates some of the issues regarding light pollution and suggests three simple actions people can take to help mitigate it.

To learn more about local efforts to mitigate light pollution check out the Homeowner's Guide to Boulder's Outdoor Lighting Ordinance.

Hubble photo of a galaxy edge on

Got an astro question?

Email us! We'd love to hear from you.

A View from Earth graphic with artistic impression of being in orbit around the Earth

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FISKE PLANETARIUM

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