The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

February brings a rare planetary parade, with five bright planets in clear view and a special alignment of Mercury and Saturn ...

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

NASA is tracking a truck-sized asteroid which is set to hurtle by Earth today at many times the velocity of a speeding bullet. The space rock—dubbed "2025 BV5"—is estimated by NASA's Jet Propulsion ...

According to NASA, this is around the time when the planet is closest to Earth, making it appear bigger and brighter. Mars is ...

Venus, Jupiter, and Mars dominate the sky. Catch your last views of Saturn as early in the month, the Moon passes in front of ...

Planetary alignments aren't rare, but they can be when they involve six of the eight planets in our solar system.

Four planets will be in the parade in January, while seven will align in February. Here's how to see the events.

Starting up again Saturday, a sweeping view of our solar system will glow in the night sky. The planetary alignment, or a ...

The BBC reports that the six planets are already visible in the night sky, with one more bonus planet (Mercury) joining the ...