A new study modeled the chemistry of TOI-270 d, an exoplanet between Earth and Neptune in size, finding evidence that it could be a giant rocky planet shrouded in a thick, hot atmosphere. TOI-270 d is ...

On Friday, April 13, 2029, an asteroid will come closer to Earth than orbiting geosynchronous satellites in a ...

NASA is closely monitoring a building-sized asteroid as it makes its closest approach to Earth today, among a group of five ...

After taking another peek at the "city-killer" asteroid that once had a small but uncomfortable chance of smashing into our ...