How Can Galaxies Recede Faster than the Speed of Light?
Question: How Can Galaxies Move Away Faster Than Speed of Light? Answer: Einstein's Theory of Relativity says that the speed…
Apollo 8 Astronaut Bill Anders Reflects on Earthrise Picture
In December of 1968, the Apollo 8 capsule had successfully gone into orbit around the moon and the crew was…
New Facts Emerge from Soyuz Emergency Landing
The facts behind the "ballistic re-entry" of the Soyuz descent capsule are beginning to come to light. According to several…
The “Best Engineering Tool” in Space: Duct Tape
The uses for duct tape seem to be endless. From the Apollo missions in the 1970's to the International Space…
Space Questions for the Week Ending April 21st, 2008
Here is a round up of all the space questions answered on Universe Today for the week ending April 21st,…
Space Questions Answered
As you can probably imagine, I get an enormous amount of email, both through Universe Today and Astronomy Cast. I…
It’s That Time of the Month for the Moon
It happens every month and specifically every time the moon is full. According to scientists, for about three days on…
How Big Do Planets Get?
Question: How Big Can Planets Get? Answer: Here in the Solar System, we have three kinds of planets: the inner…
X-Ray Flare Echo Reveals Supermassive Black Hole Torus
The light echo of an X-ray flare from the nucleus of a galaxy has been observed. The flare almost certainly…
Astrophotography: NGC 3718 by Dietmar Hager
If southern skies stargazers thought there was nothing to the north to be interested in, then think again. There's a…