The planet WASP-64b is 1.3 times the radius of Jupiter, the largest planet in our Solar System. It it thus a gas-giant planet with a radius 13 times bigger than our rocky Earth.
WASP-64b is about 1 and a quarter the mass of Jupiter, which means that it has a similar density to Jupiter.
The star WASP-64 is very like our Sun, with a similar mass and radius.
WASP-64b orbits at a distance of 4 million km from its star, taking 1.6 days to go round its orbit.
Transits of WASP-64b across the face of its star were first seen by the WASP-South camera array, situated in South Africa. The discovery of the planet was announced in 2013 in a paper led by Michael Gillon.
For more information visit http://exoplanet.eu/catalog/wasp-64_b/.