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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.

Close up photo of a Sunflower on a summer day
The Sun

July 12, 2021

Our Sun, the powerhouse of the solar system and life-giving orb in our sky is approximately 93 million miles away and it takes 8.3 minutes to receive its energy and warmth. Fun Fact: This is easily calculated by dividing 93,000,000 miles by 186,000mps (speed of light in miles per second) = 500 seconds.

Read more about The Sun

Screen capture from the app SkySafari Pro showing the western sky with Leo the Lion, the crescent moon, venus and mars
Twilight Dazzles

July 11, 2021

Twilight in the western sky dazzles us with celestial wonders for the next few days! Venus blazes brightly at -3.9 magnitude and nearby Mars is fading to 1.8 magnitude. The waxing crescent Moon steals the show on Sunday then exits left Monday and Tuesday. Grab your binoculars and search for...

Read more about Twilight Dazzles

Picture in dome of Fiske of the Full Moon with grasses in the foreground
Full Moon

June 24, 2021

Enjoy the Full Moon on June 24th! It's a great time to take a night hike with friends. #funfact Full moons that fall within the month of June are called Rose or Strawberry moons.

Read more about Full Moon

Photo of sunshine coming through cottonwood trees
Summer Solstice

June 20, 2021

Soak up them rays! It’s the longest day of the year for those of us north of the equator. Enjoy 15 hours of sunshine! Solstice occurs at 9:32p.m. MDT. More info on Sky & Telescope's Sky at a Glance .

Read more about Summer Solstice

Milky Way in the Sky with the Great Sand Dunes in Colorado in view
Colorado Dark Skies

June 9, 2021

Looking for dark skies this summer? Grab a red flashlight + telescope or binos and check out these International Dark Sky Parks in Colorado: Black Canyon of the Gunnison National Park Dinosaur National Monument Florissant Fossil Beds National Monument Great Sand Dunes National Park and Preserve Hovenweep National Monument Jackson...

Read more about Colorado Dark Skies

Chart from Sky & Telescope article of the times and totality for the Moon
Total Lunar Eclipse

May 24, 2021

How much do you love the Moon? Willing to get up early Wednesday? What about driving east of Boulder? If you’re willing, your commitment will be richly rewarded with seeing the first total lunar eclipse in 2+ years. The full Moon will set behind our glorious Rocky Mountains during totality...

Read more about Total Lunar Eclipse

Image of Tonight's sky with the ecliptic from Stellarium
Colorado Sunsets

May 18, 2021

Enjoy watching our beautiful Colorado sunsets? Stay for the twilight encore as Venus joins Mercury in the west-northwest. Mars can be spotted a bit higher up + the waxing Moon makes an appearance along with Regulus in the constellation of Leo.

Read more about Colorado Sunsets

Lights out colorado logo with birds and stars
Lights Out Colorado

May 4, 2021

The International Dark-sky Association & Denver Audubon have teamed up for Lights Out Colorado . 80% of birds in North America migrate at night. Coloradans can save millions of birds as they migrate over our state, keep our skies darker, & save energy w/ 2 simple steps: Shield outdoor lights...

Read more about Lights Out Colorado

Photo of the Full Moon with some clouds Photo Credit: NASA/Joel Kowsky  
Full Pink Moon

April 27, 2021

Did you catch the Full Pink Moon last night? If not, don’t worry, it’ll still appear big and bright tonight too. Grab your binos or small scope and check out Sky & Telescope’s 7 Easy Things to See on the ‘SuperMoon.’ If it rains, you can always catch the next...

Read more about Full Pink Moon

NASA SpaceX-Crew-2 four Astronauts
NASA SpaceX Crew-2 Mission scheduled to launch

April 20, 2021

NASA’s SpaceX Crew-2 is ready to launch to the ISS on April 22! The Crew-2 flight includes mission specialist Thomas Pesquet from ESA, pilot Megan McArthur and commander Shane Kimbrough both from NASA, and mission specialist Akihiko Hoshide from JAXA (left to right). NASA TV LIVE launch coverage . Photo...

Read more about NASA SpaceX Crew-2 Mission scheduled to launch

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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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