Why is the night sky black?

It sounds obvious. That's what night is. The sun has set and when you look up at the sky, it's black. Except where there's a star, of course. The stars are bright and shiny.

NASA image: A precocious black hole

In July 2015, researchers announced the discovery of a black hole, shown in the above illustration, that grew much more quickly than its host galaxy.

VISTA pinpoints earliest giant galaxies

Just counting the number of galaxies in a patch of sky provides a way to test astronomers' theories of galaxy formation and evolution. However, such a simple task becomes increasingly hard as astronomers attempt to count ...

Whopping galaxy cluster spotted with help of NASA telescopes

Astronomers have discovered a giant gathering of galaxies in a very remote part of the universe, thanks to NASA's Spitzer Space Telescope and Wide-field Infrared Survey Explorer (WISE). The galaxy cluster, located 8.5 billion ...

Hubble spies Big Bang frontiers

Observations by the NASA/ESA Hubble Space Telescope have taken advantage of gravitational lensing to reveal the largest sample of the faintest and earliest known galaxies in the Universe. Some of these galaxies formed just ...

Image: Hubble sees elegant spiral hiding a hungry monster

NGC 4639 is a beautiful example of a type of galaxy known as a barred spiral. It lies over 70 million light-years away in the constellation of Virgo and is one of about 1,500 galaxies that make up the Virgo Cluster.

New tool: How to get meaningful information out of big data

Every second trillions of data bits are accumulated and stored. All these data bits make no sense if you don´t know how to sort them. Now University of Southern Denmark (SDU) researchers present a tool that helps researchers ...

Researchers propose new way to chart the cosmos in 3D

If only calculating the distance between Earth and far-off galaxies was as easy as pulling out the old measuring tape. Now UBC researchers are proposing a new way to calculate distances in the cosmos using mysterious bursts ...

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