WR 104 is notable not just for the rarity of Wolf-Rayet stars in the galaxy, but also for the spiral shape its escaping dust ...

For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare great planetary alignment. Here's how to make sure you don't miss this ...

The eight major planets of our Solar System orbit the Sun in the same flat plane ... so they appear in an arc across the sky due to their orbital plane in the Solar System. During clear nights ...

The eight planets in our solar system orbit the sun in roughly the same plane ... in orbital periods between the planets. Mercury, which is closest to the sun, takes about 88 Earth days to ...

Each planet in the solar system stays on this plane, but the main difference among them lies in their orbital speed; the farther a planet is from the Sun, the slower it will orbit. Mercury, the ...

Quasiperiodic changes in Earth's orbit around the sun regulate the amount of incoming ... major changes in climate and biota ...