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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.

Photo of purple crocuses in the snow
The Spring Equinox

March 20, 2022

Celebrate the Spring Equinox at Fiske with a Colorado Skies talk on March 20 at 1pm! Learn more about why the Sun rises due east and sets due west on the equinoxes, plus why day and night are approximately equal in length. We'll also explore the spring constellations and let...

Read more about The Spring Equinox

Photo of a full moon rising amidst the clouds in March 2020
Full Moon

March 17, 2022

Watch the last full Moon of the winter season rise in the east tonight at about 7:45pm MDT. Send us your pictures ! Photo credit: NASA/Joel Kowsky

Read more about Full Moon

Graphic from Stellarium showing the Moon in the constellation of Leo the lion
Moon in Leo

March 15, 2022

The waxing gibbous Moon will be your guide this evening for spotting the spring constellation of Leo. The lion rises earlier every evening revealing that spring is almost here. Graphic credit: Stellarium

Read more about Moon in Leo

Graphic from Stellarium showing the Moon between the Hyades cluster and the Pleiades
The Moon between Clusters

March 8, 2022

Tonight the waxing crescent Moon is framed by Taurus’s famed Hyades cluster on the left and the Pleiades cluster on the right. Follow the ecliptic down from the Moon to spot ice-giant (and yes, a gassy planet with an atmosphere comprised of Hydrogen, Helium and Methane) Uranus through a telescope...

Read more about The Moon between Clusters

Graphic from Sky & Telescope magazine showing the southeastern horizon with Venus, Mars and Mercury close to constellation of Sagittarius
Rocky Planets - Our Favorites!

Feb. 5, 2022

We LOVE rocky planets! Especially, our Earth! Grab your binos to see all of the solar system’s terrestrial gems Saturday, February 5th about 30 minutes before sunrise. Binos are optional for Earth, of course. Want to know more? Check out Sky & Telescope 's weekly article This Week at a...

Read more about Rocky Planets - Our Favorites!

Photo of yellow crocuses in the snow
Groundhog Day

Feb. 2, 2022

It’s Groundhog Day! Punxsutawney Phil can’t really predict the weather, but he can confirm his holiday has roots in ancient astronomy. February 2 is a cross-quarter day, meaning it's half way between the winter solstice & the spring equinox.

Read more about Groundhog Day

Photo of the updated installment of the scale-model solar system. Photo credit: James Negus
Sky & Telescope's Stargazer’s Corner: A New Scale-Model Solar System

Jan. 20, 2022

From Sky & Telescope magazine: The University of Colorado, Boulder, has unveiled a 1:10 billion scale-model solar system with an interactive sound experience. Have you ever longed to experience a planetary voyage through the solar system? Or to travel from the Sun from Jupiter? The University of Colorado, Boulder (CU...

Read more about Sky & Telescope's Stargazer’s Corner: A New Scale-Model Solar System

Photo of the full moon from NASA with the two craters Tycho and Copernicus labeled along with the more prominent mare
First full Moon of 2022

Jan. 17, 2022

Enjoy watching the first full Moon of 2022 tonight! Can you spot the bright craters Tycho & Copernicus with your unaided eye? Look for the dark, smooth mare too. Mare means seas in Latin, but we now know mare are ancient lava flows. It's amazing what we can see from...

Read more about First full Moon of 2022

Photo of Sirius by Akira Fujii
Sirius

Jan. 10, 2022

Have you seen Sirius—the brightest star visible from Earth? Use Orion’s belt to draw a line to the lower left to spot the brilliant Dog Star in Canis Major. Sirius is 8.6 LYs away (a mere 51 trillion miles) and one of our nearest stellar neighbors.

Read more about Sirius

Photo from NASA Earth Observatory - shows four photos of earth in black and white demonstrating the changes of the seasons, related to the position of sunlight on the planet, are captured in this view from Earth orbit by the Meteosat instrument
Shortest Day of the Year + Longest Night

Dec. 21, 2021

Welcome to the shortest day of the year - the winter solstice! Avid observers, bundle up and enjoy the longest night of the year. Earth’s axial tilt causes the Sun to be at its farthest south (lowest) in the sky today for Northern Hemisphere dwellers. The Southern Hemisphere receives the...

Read more about Shortest Day of the Year + Longest Night

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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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