51 Pegasi

An artist's impression of the planet 51 Pegasi B

51 Pegasi

In 1995 astronomers announced that they had discovered a planet, 51 Pegasi B, in orbit around its star, 51 Pegasi - the first exoplanet found orbiting a star similar to the Sun.

Measurements of the tiny wobbles the planet's gravitational interaction caused in 51 Pegasi's orbit confirmed its existence. It takes 51 Pegasi B only four days to orbit its star, and surface temperatures are thought to exceed 1,000C.

The first exoplanet was discovered orbiting a pulsar in 1992. Hundreds of exoplanets have been discovered since.

Image: An artist's impression of the planet 51 Pegasi B (credit: Dr Seth Shostak/SPL)

Watch and listen to clips from past programmes TV clips [1]

An artist's impression of the planet 51 Pegasi B

Introduction

Astronomers find a planet orbiting a star similar to the Sun.

About 51 Pegasi

51 Pegasi (abbreviated 51 Peg) is a Sun-like star located 50.9 light-years (15.6 parsecs) from Earth in the constellation Pegasus. It was the first extrasolar Sun-like star found to have a planet orbiting it.

Read more at Wikipedia

This entry is from Wikipedia, the user-contributed encyclopedia. If you find the content in the 'About' section factually incorrect, defamatory or highly offensive you can edit this article at Wikipedia.

Continue your journey

One of many

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.