An accidental discovery in an astronomy show offers researchers a new clue about the mysterious Oort Cloud, a large expanse ...

The location of the solar system's outer boundary is a point of contention among astronomers. There are three possible candidates, which "all have merit." But which one is best? When you purchase ...

These drift through the frigid outermost reaches of the Solar System at distances of up to 200,000 AU (approximately 3 Light Years). An Oort Cloud object may take millions of years to orbit the ...

For comparison, the dwarf planet Pluto is located 34 AU from the Sun. This illustration shows the Solar System's distances to scale. ROBERTO MOLAR CANDANOSA, SCOTT S. SHEPPARD (CARNEGIE ...

Our planet is just the right distance from the Sun for life to exist ... There are eight planets in our Solar System. The closest one to the Sun is Mercury, then it’s Venus, Earth, Mars ...

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new ...

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be fair—but one of the largest yet discovered and with an orbit around the Sun that ...