A group of researchers has observed the first ground-based transit observation of K2-3d — a potentially Earth-like extrasolar planet supposedly within the habitable zone around a bright M-dwarf host star 147 light-years away — using the multi-band imager MuSCAT on the Okayama Astrophysical Observatory’s 1.88-metre telescope.
Discs of dust and gas that surround young stars are the formation sites of planets. New images from the Atacama Large Millimetre/submillimetre Array (ALMA) reveal never-before-seen details in the planet-forming disc around a nearby Sun-like star, including a tantalising gap at the same distance from the star as the Earth is from the Sun.
An international team of astronomers, led by the University of Cambridge, has obtained the most detailed ‘fingerprint’ of a rocky planet outside our solar system to date, and found a planet of two halves: one that is almost completely molten, and the other which is almost completely solid. Exoplanet 55 Cancri e lies 40 light-years from the Sun.
For the first time astronomers were able to analyse the atmosphere of a super-Earth exoplanet. Using data gathered with the Hubble Space Telescope and new analysis techniques, the exoplanet 55 Cancri e some 40 light-years away is revealed to have an atmosphere consists mainly of hydrogen and helium without any indications of water vapour.
Australian astronomers from the University of New South Wales have discovered the closest potentially habitable planet found outside our solar system so far, orbiting a star just 14 light-years away. The planet, more than four times the mass of the Earth, is one of three that the team detected around a red dwarf star called Wolf 1061.
Astronomers have detected wildly changing temperatures on a super-Earth — the first time any atmospheric variability has been observed on a rocky planet outside the Solar System — and believe it could be due to huge amounts of volcanic activity, further adding to the mystery of what had been nicknamed the ‘diamond planet.’