Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

Here’s what you should know when you go outside to see for yourself: Yes, the planets are indeed lined up across our sky. No, ...

This means that objects in small orbits travel faster than objects in large orbits. The graph shows how the orbital speed of a planet changes with its distance from the Sun.

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show ...

The seven planets will not be perfectly aligned, but will appear in an arc across the sky due to their orbital plane in the Solar System.

While the planets won’t be perfectly aligned, their placement will follow the orbital plane of our solar system. To witness a planet parade, you can primarily use your naked eyes to see the ...