Nasa spacecraft spots gaseous planet three times the size of Earth

Tess mission has detected three new planets and six supernovae in its first three months

Three new planets and six supernovae outside our solar system have been observed by Nasa's planet-hunting Tess mission in its first three months.

Since it started surveying the sky in July, the MIT-led Transiting Exoplanet Survey Satellite project has identified Pi Mensae c, a "super-Earth" that travels around its star every six days, and LHS 3844b, a rocky world with an orbit of only 11 hours.