Astronomy
Lights in the Sky: Meteors, Reentry, or E.T.?
A guide to identifying strange lights in the sky.
NASA Estimates SpaceX 2018 Mars Mission Will Cost Only $300 Million
The SpaceX mission to Mars in 2018 will cost the company a cool $300 million, according to estimates presented at…
The Constellation Caelum
Located in the southern skies, far from the plain of the Milky Way, is the faint Caelum constellation, which represents…
Chinese Fireball Freaks Out Las Vegas
The fireball that appeared above Las Vegas earlier this week was apparently the result of a spent Chinese rocket falling…
What Is Bohr’s Atomic Model?
The Bohr atomic model (sometimes known as the Rutherford-Bohr atomic model) was a major milestone in the development of modern…
See a Wonderful Aldebaran Occultation with a Spectacular Twist
Set your alarm for Friday morning at dawn when the crescent Moon will either cover up, barely miss or pass…
The Photon Sieve Could Revolutionize Optics
Scientists at NASA"s Goddard Space Flight Center are developing the photon sieve, a small, inexpensive device designed to study the…
What is Earth’s Axial Tilt?
In both the course of a year, and over the course of millennia, Earth experiences variations due to the fact…
How Far is Mars from the Sun?
Mars is not only further from the Sun than Earth, but has an eccentric orbit that leads to a great…
Celestial Photobomb: Rare Occultation of Mercury by the Moon Set for Next Week
Catch a rare conjunction of Mercury with the Moon next week, and an occultation for a very privileged few.