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.
The universe is 13.8 billion years old, while our planet formed just 4.5 billion years ago. Some scientists think this time gap means that life on other planets could be billions of years older than ours. However, new theoretical work suggests that present-day life is actually premature from a cosmic perspective.
More than 100 confirmed exoplanets — the biggest haul of worlds uncovered by the stabilised and repurposed Kepler space telescope in its K2 mission — is reported by an international science team led by the University of Arizona. Excitingly, the new population includes many worlds that could be rocky and cool enough to potentially support life.
Exoplanet KELT-4Ab, about one and a half times the size of Jupiter, orbits the main star of a three-star system every three days. The system’s other two stars orbit each other once every 30 years while simultaneously orbiting the main star — and the planet — once every 4,000 years. The triple star system lies about 685 light-years from Earth.
With a view 100 times bigger than that of the Hubble Space Telescope, NASA’s Wide Field Infrared Survey Telescope (WFIRST) will aid researchers in their efforts to unravel the secrets of dark energy and dark matter, and explore the evolution of the cosmos. It also will discover new worlds outside our solar system and advance the search for worlds that could be suitable for life.