Earth flies between Mars and sun on May 22, bringing it closer than Mars has been in over a decade. How to find and enjoy Mars during 2016's close opposition!
First time we can see 5 planets at once since 2005. All 5 are up before dawn, still, and all 5 will remain visible until Mercury disappears in the dawn just after mid-February.
Longest lunar month of 2015 starts with the October 13 new moon and ends with the November 11 new moon. Learn about the varying lengths of lunar months, here.
There are currently 40 different Saros series in progress, each with its own assigned number. The total solar eclipse of March 20, 2015 belongs to Saros 120.
Virgin Galactic’s SpaceShipTwo rocket plane - a craft intended to carry tourists on suborbital flights - exploded and crashed during a test flight Friday.