Skygazers, mark your calendars because one of the coolest celestial events is coming around again toward the end of February.

Scientists, including one of Indian origin, have identified 20 potentially habitable Earth-like rocky planets from a trove of over 4,000 exoplanets discovered by Nasa’s Kepler mission till date.

The current parade of planets, mistakenly called a planetary alignment by some, in the night sky shortly after sunset has been calculated as a few-times-a-century phenomenon by scientists. According ...