February 7th, 2016
New Moon
Seth Jarvis

Cosmic Quiz Winner

This week’s cosmic quiz question was submitted by Daniel Wallace, who asked, “How do astronomers figure out the size of planets orbiting other stars (and even what their atmosphere is made of)?”


Happy Day of Lammas!

What? You don’t know what the Day of Lammas is? Lammas is traditionally recognized as August 1st each year, and is celebrated by baking loaves of bread from the first wheat harvests. But there is a strong astronomical connection to…

Seth Jarvis

Cosmic Quiz – Why is the moon sometimes visible during the day?

This week 6-year-old Kambreigh Schooley asked us why she can sometimes see the moon during the daytime…What a great question! To answer this question you need to first remember that one half of the moon is always illuminated by the…

How Big? A look at figuring size and scale

A few days ago, I needed to increase the size of an astronomical table to make it easier for my aging eyes to read. It was about half the size of a standard sheet of paper, so I decided to…

Seth Jarvis

Cosmic Quiz – Flag Waving on the Moon

Joseph Amundsen’s recent Cosmic Quiz Question asks why the flags placed on the moon by the Apollo astronauts appear to be flapping in the wind.


The longest solar eclipse of the 21st century

The longest total solar eclipse of the 21st century occurs on July 22nd, 2009…in the eastern hemisphere. The eclipse totality path passes through India, Tibet, China

Celebrating the 40th Anniversary of Apollo 11

Download the Celebrating the 40th Anniversary of Apollo 11 (PDF)

What is dark matter?

The short answer is no one really knows. Dark matter is a name given to something that, so far, has only been detected by the gravitational force that it exerts on visible matter and light. In fact, that gravitational force…

Visit Clark Planetarium and more with Connect Pass

Finding fun activities to do during the summer is always at the top of the list. I recently told you about some of our leading summer staycation ideas and just found out that one of those highlighted, the Visit Salt…