Space

Hubble finds ring of dark matter

Hubble finds ring of dark matter

Astronomers have long suspected the existence of the invisible substance of dark matter as the source of additional gravity that holds together galaxy clusters. Otherwise, astronomers say, the…
A galactic fossil

A galactic fossil

How old are the oldest stars" Using ESO's VLT, astronomers recently measured the age of a star located in our Galaxy. The star, a real fossil, is found to be 13.2 billion years old, not very far from…
One hot planet

One hot planet

"HD 149026b is simply the most exotic, bizarre planet. It’s pretty small, really dense, and now we find that it’s extremely hot." Using Spitzer, NASA’s infrared space telescope,Joseph Harrington of…