Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists. Peer ...

Artist’s impression of the TRAPPIST-1 planetary system (Credit: ESO/N. Bartmann/spaceengine.org) Astronomers have found a system of seven Earth-sized planets just 40 light-years away. Using ground and ...

Add Yahoo as a preferred source to see more of our stories on Google. Venus, Mars and Jupiter will be the easiest planets for skygazers to see (Rodin Eckenroth / Getty Images) News of an unusual ...

Astronomers had hoped to observe an atmosphere on one of the seven planets known to orbit Trappist-1, a red dwarf star. A new study found nothing to write home about. By Jacey Fortin In the search for ...

Scientists are steadily ruling out habitable conditions on the seven planets of the star Trappist-1. On one of the worlds, a nitrogen gas-rich veil remains a possibility. By Robin George Andrews ...

The latest "planet parade" is set to cap off February by lighting up the night sky. Jupiter, Saturn, Venus, Neptune, Uranus and Mercury will appear to line up. While this one isn't quite the full ...