Could a giant planet between Mars and Jupiter have doomed Earth? A new study suggests that small changes would have been manageable, but a massive super-Earth could have made our planet uninhabitable — offering clues about where life might (or might not) exist beyond our solar system.

"It's like a game of billiards around the solar system, flying by a couple of planets at just the right angle and timing to build up the energy we need to get to Jupiter and Europa."

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A total eclipse of the Moon is the highlight of this month, visible across North and South America. Venus remains very bright and transitions from evening to morning late in the month. Mercury joins Venus for a few evenings,

On Feb. 28, seven planets—Mars, Jupiter, Uranus, Venus, Neptune, Mercury, and Saturn—will all grace the early evening sky. Mercury, Venus, Jupiter, and Mars will be easy to spot with the naked eye, while Uranus and Neptune will require binoculars or a small telescope.

NASA’s Europa Clipper is using Mars and Earth’s gravity to travel efficiently to Jupiter. The spacecraft will study Europa’s ice and ocean.

While much of what you've been hearing about a "Planetary Parade," is pure hype, you still do have reason to look into the night sky Sunday.

An alignment of seven planets will be visible in Friday's evening sky. Here's when and where to view the celestial phenomenon from Texas.

After dusk on Friday night, seven planets are expected to align in the night sky. But you'll need binoculars or a telescope to see them all.

Seven planets are on display in the night sky at the end of February, but some will be harder to spot than others. Here’s what you need to know to catch a glimpse.

Seven planets will line up for a "planet parade" on Friday, Feb. 28, as Mercury lines up with Mars, Jupiter, Uranus, Neptune, Venus and Saturn.