NASA is monitoring three aircraft-sized asteroids that will zoom past the Earth later today at around 19,000 to 22,200 miles per hour.

Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard's Star, the second-nearest star system to Earth.

Exciting new research suggests there are four miniature planets orbiting Barnard’s Star, each thought to be just 20 to 30% ...

Once the new measurements were taken and the math was done, the probability of YR4 hitting the Earth began to decline, ...

Scientists with a new theory about how Earth’s early continents formed predicted where a superold impact crater should ...

Another finding was how dramatically the planets varied in brightness over just three years. The team discovered that PDS 70 ...

Any telescope on the planet can contribute to planetary defense: If an astronomer anywhere on Earth spies an object that looks like an asteroid (or comet), they can report its findings to the ...

THURSDAY, PROBABLY NOT SO MUCH, BUT FRIDAY AND THE WEEKEND. THINGS ARE LOOKING GOOD. TWO OF THE SEVEN PLANETS, THREE ARE EASILY FOUND AND WE’LL JUST TALK ABOUT THOSE REALLY QUICK. JUPITER IS ...

Then there is the outer core, made of liquid metal, and the inner core, a solid ball of metal ... materials and incredible ...

Mercury, the closest planet to the Sun, completes an orbit – a year for the planet – in 88 days. Earth's year, of course, is 365 days, while at the upper end, Neptune takes a whopping 60,190 ...

Mercury, being the closest to the sun, completes an orbit in only 88 days, compared with Earth’s 365-day year. In stark contrast, Neptune, the farthest planet from the sun, takes a staggering ...