Earth’s orbit around the Sun isn’t a perfect circle—it’s slightly elliptical. Each year, around July 2 or 3, Earth reaches its farthest point from the Sun, known as aphelion. Around January 2 or 3, ...

For the past 60 years, Earth has had a secret companion in space—a quasi-moon that has been sharing our planet’s orbit around ...

The object, the latest “quasi-moon” detected by astronomers, could be with us for almost another 60 years. By Robin George Andrews The Earth stands alone in the solar system as a habitable world, as ...

For the next half-century, Earth will have a new celestial companion. A small asteroid, officially designated 2025 PN7, has ...

Earth will be hosting a new guest this fall. No, it's not an alien. It's an asteroid. The space rock, which has been named “2024 PT5,” has been traveling along its normal path around the sun, but will ...

Earth’s path around the Sun is not a fixed racetrack but a slowly shifting orbit, and those subtle changes have a long ...

(via minutephysics) We think of the moon as orbiting the earth, following a spiraling trajectory as the earth itself orbits the sun. But this is wrong. Not only is the moon's orbit NOT a spiral ...

"A three-body problem is extremely complicated. Now we're dealing with four: the sun, Earth, the moon and Mars. The heavy ...