March 20 Thursday is the March Equinox–the beginning of spring in the Northern Hemisphere and the beginning of autumn in the Southern Hemisphere. It is one of the two days in the year that the Sun is directly over the equator. It is also one of the two days in the year the the Sun… Read More Equinox
Answer: Really, Really Big and Empty Here is another visualization of just how big the solar system is, and how much empty space exists. That’s why we call it “space,” after all. It’s called “If the Moon Were Only 1 Pixel,” and it was created by Josh Worth art and design.
Answer: Really Big The BBC has created a fun interactive called “Space Race” that gives you a sense of just how big the solar system is. [Hat tip: io9]
Southern Lights It is finally March. Chicago is slowly thawing out from a bitterly cold winter, and it is a good time to take a look again at the spectacular bright stars that are typically associated with the winter sky. An hour after sunset (around 8:00 pm Central Daylight Time), look to the south. As… Read More Skywatching: March 13-23