Hubble Views the NGC 976 Galaxy in Aries

The Hubble Space Telescope.

The Hubble Space Telescope views the NGC 976 galaxy in the constellation Ares. (Image: via NASA)

The lazily winding spiral arms of the spectacular NGC 976 galaxy fill the frame of this image from the NASA/ESA Hubble Space Telescope. This spiral galaxy lies around 150 million light-years from the Milky Way in the constellation Aries.

Supernova explosion in the NGC 976 galaxy

Despite its tranquil appearance, the NGC 976 galaxy has played host to one of the most violent astronomical phenomena known — a supernova explosion. These cataclysmically violent events take place at the end of the lives of massive stars and can outshine entire galaxies for a short period. While supernovae mark the deaths of massive stars, they are also responsible for the creation of heavy elements that are incorporated into later generations of stars and planets.

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The tranquil-looking NGC 976 galaxy hosted a supernova explosion.
These cataclysmically violent events take place at the end of the lives of massive stars and can outshine entire galaxies for a short period. (Image: D. Jones, A. Riess et al via ESA / Hubble & NASA)

Supernovae are also a useful aid for astronomers who measure the distances to faraway galaxies. The amount of energy thrown out into space by some types of supernova explosions is very uniform, allowing astronomers to estimate their distances from how bright they appear to be when viewed from Earth. This image — which was created using data from Hubble’s Wide Field Camera 3 — comes from a large collection of Hubble observations of nearby galaxies that host supernovae, as well as a pulsating class of stars known as Cepheid variables. Both Cepheids and supernovae are used to measure astronomical distances, and galaxies containing both objects provide useful natural laboratories where the two methods can be calibrated against one another.

Provided by NASA [Note: Materials may be edited for content and length.]

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