Alaska Science Forum: Looking back in time at the world’s oceans
A time capsule of satellite imagery of the earth will become available to scientists this month.
Colliding Galaxy Pair Takes Flight
This striking NASA Hubble Space Telescope image, which shows what looks like the profile of a celestial bird, belies the fact that close encounters between galaxies are a messy business.
Dusty Surprise Around Giant Black Hole
Over the last twenty years, astronomers have found that almost all galaxies have a huge black hole at their centre. Some of these black holes are growing by drawing in matter from their surroundings, creating in the process the most energetic objects in the Universe: active galactic nuclei (AGN).
Hubble Maps 3-D Structure of Ejected Material Around Erupting Star
WASHINGTON — A flash of light from a stellar outburst has provided a rare look at the 3-D structure of material ejected by an erupting nova.