April 19th, 2014
Waning Gibbous Moon
moon
Seth Jarvis

The Art and Science of Colliding Galaxies

In several billion years the galaxy we live in, the Milky Way Galaxy, will collide with our nearest neighboring galaxy, the Andromeda Galaxy. 

Robert Bigelow

December Mystery Meteor Shower

Meteor showers occur when Earth passes through a stream of debris given off by a comet. Particles that make up this debris stream typically range in size from pebbles to sand grains.

Seth Jarvis

Dr. Higgs, I presume?

Today is the 4th of July, which makes most of us think of glorious fireworks and celebrating only our Declaration of Independence.  Today’s fireworks might also celebrate what is likely to become the anniversary date for the announcement of an…

Seth Jarvis

Hubble, as a movie camera!

There are times when “Wow!” just isn’t enough of a word.  Astronomers just released movies made by stitching together 14 years of Hubble Space Telescope images to reveal the beautiful and fascinating movements of stellar gas clouds surrounding newborn stars.

Robert Bigelow

International Observe the Moon Night

On September 18, 2010 amateur astronomers, educators, scientists and the general public will celebrate International Observe the Moon Night by observing and learning more about our nearest neighbor. 

Rob Morris

Aurora Watch for Salt Lake City (and other magnetic latitudes above 45N)

20% chance of an aurora visible tonight. Look to the north from a dark location!

Jesse Warner

Illusions of the seasons: Part 1

Understanding why the Earth has seasons is one of the most difficult concepts for people to understand because it is often difficult for people to abandon their preconceived ideas.  Some widely held misconceptions are: Misconception #1     The Seasons are caused…

Robert Bigelow

Is the Sun directly overhead?

In my March missive on Daylight Saving Time, I mentioned a misconception that is held by some students and possibly some adults as well. A more common misconception concerns the apparent height of the Sun in the sky. When I ask…

Robert Bigelow

Neutrinos and Supernova 1987A

Twenty-three years ago, on 23 February 1987 at 12:35 a.m. MST, detectors in the US, Japan and Russia observed a burst of 24 neutrinos. They came from a supernova in the Large Magellanic Cloud, a small satellite galaxy to the…

Robert Bigelow

A Different Star

If we could travel back in time several thousand years to observe the night sky, we would notice two main differences compared to the night skies of today.   The most obvious would be the lack of a sky glow…