On February 14, 1990, after nearly 13 years of travel through the outer Solar System, NASA’s Voyager 1 spacecraft crossed the orbit of Pluto and turned its camera around, capturing photos of the planets as seen from that vast distance. It was a family portrait taken from over 4.4 billion kilometers away — the ultimate space Valentine.
An image of the Milky Way’s Galactic Center in the night sky above Paranal Observatory (Image from wiki.org) Stars called red dwarfs may support planets on which life is possible. With three quarters of stars in the Milky Way being red dwarfs, there may be 4.5 billion habitable planets in our galaxy, a new [...]
Artist’s impression: five planets orbit the star Tau Ceti, which is just 11.9 light-years from Earth. (J Pinfield/RoPACS network/University of Hertfordshire) Astronomers have discovered that the closest Sun-like star, Tau Ceti, is orbited by five planets, one of which is in the “habitable range”. If its existence is confirmed, the planet could be the closest [...]