The Latest Breaking News from Gianluca Masi

NASA estimates the asteroid Alinda is roughly the same width as Manhattan

The enormous near-Earth asteroid (887) Alinda has made its closest approach to our planet in decades, and it's about to peak in brightness in a rare once-in-a-decade event. Here's how to watch it live this weekend.

Comet Tsuchinshan-ATLAS will sweep around the sun on Sept. 27 to make a brief foray into the morning sky. Will it be a bright naked-eye object with a significant tail? Here's where and when you might be able to see it.

Check out some of the best Supermoon Blue Moon photos captured by skywatchers worldwide. The first of four supermoons this year put on quite the show.

Telescopes caught a glimpse of Europe's JUICE probe as it swings by Earth and the moon for a gravitational assist on its way to explore Jupiter's icy moons.

Don't miss the stunning Supermoon Blue Moon rise above the sea in this free livestream, courtesy of the Virtual Telescope Project.

On Aug. 14, Jupiter and Mars appeared closer together than they've been in over two years. Here are some of the best photos of this rare event.

Shortly after 4 p.m. ET, the mountain-size asteroid 2011 UL21 will come within 5 million miles of Earth, making it one of the largest space rocks to come that close to our planet for 125 years. Here's how to watch the close encounter live, or see it with a telescope.

The robotic telescopes of the Virtual Telescope Project have observed a quasar powered by a supermassive black hole 3 billion times as massive as the sun at the very edge of the universe