Cosmic collision is caught on cam

Space scientists have snapped a spectacular cosmic pile-up – a collision involving four galaxies and many billions of stars. The crash scene lies 280 million light years from Earth in the constellation of Pegasus, the winged horse.

Stephan's Quintet imaged by Chandra and the Canada-France-Hawaii TelescopeIt is labelled Stephan’s Quintet because a fifth galaxy is visible in the foreground and not involved in the collision.

Astronomers created the picture using a combination of images taken with NASA’s Chandra X-ray observatory in space and the giant Canada-France-Hawaii Telescope on Hawaii.

It is issued just weeks after a dramatic montage of images of colliding galaxies imaged by the Hubble space telescope was released.

One galaxy in the new picture, NGC 7318b, is passing through the others at almost two million miles per hour, causing a huge shockwave that shows up as the central bright blue ridge. The others are called NGC 7317, NGC 7318a, NGC 7318b and NGC 7319.

Despite the collision, the many billions of individual stars are unlikely to run into each other due to the vast distances between them. But the pull of the galaxies on each other have produced the long bright tails visible in the picture.

Chandra scientists say the Quintet has also probably been heated by supernova explosions and space breezes from the stars like our own solar wind. There is evidence, too, for previous collisions within the group of galaxies, in the shape of a larger halo of X-ray emission that is not visible in this picture but was detected by the European Space Agency’s XMM-Newton satellite.

Cosmologists are interested in Stephan’s Quintet because it gives them a rare opportunity to observe a group of “star cities” as it evolves from spiral galaxies to ellipticals.

Credit: X-ray (NASA/CXC/CfA/E.O’Sullivan); Optical (Canada-France-Hawaii-Telescope/Coelum).

• Discover space for yourself and do fun science with a telescope. Here is Skymania’s advice on how to choose a telescope. We also have a guide to the different types of telescope available.

Get free Skymania news updates by email

Sign up for alerts to our latest reports. No spam ever - we promise!

You might also enjoy these posts
NASA’s Juno probe captures Jupiter as we have never seen it before NASA’s Juno space probe has sent back remarkable new pictures of giant planet Jupiter, including a look down onto its stormy polar regions.
Humans must urgently colonise new worlds, warns Professor Stephen Hawking Leading scientist Professor Stephen Hawking warned today that the human race must urgently make plans to colonise other planets.
World’s highest telescope takes amazing picture of a band of colliding comets ALMA, the world's highest telescope, has produced a remarkable and detailed image of a ring of dusty debris encircling a young star, Fomalhaut, that lies only 25 light-years away.
Rare chance to see Mare Orientale, site of giant impact on the Moon Here is how you can see a huge impact basin on the Moon that is usually hidden on the far side.
How to see Comet Johnson in the spring night sky Here's how to see Comet Johnson, which is now on view in the night sky. It should be easy to find with binoculars, providing you have clear, dark conditions.
Amazing Hubble photo shows countless galaxies, each containing billions of stars NASA's Hubble Space Telescope has looked nearly halfway back to the beginning of the Universe to capture a cluster of galaxies, made up of billions of stars, acting as a natural te...

By Paul Sutherland

Paul Sutherland has been a professional journalist for nearly 40 years. He writes regularly for science magazines including BBC Sky at Night magazine, BBC Focus, Astronomy Now and Popular Astronomy, plus he has authored three books on astronomy and contributed to others.

Leave a Reply

Your email address will not be published. Required fields are marked *

Comment moderation is enabled. Your comment may take some time to appear.