Planets, like those in our solar system, form in a bottom-up process where small bits of rock and ice clump together and grow larger over time. But the heftier the planet, the harder it is to explain ...

When you see art of our solar system as the planet orbit the sun, you may notice that Earth's orbit has a tilt. It is not a perfect circle. What's more, Earth is not the only planet that displays such ...

An artist's impression of the planetary system surrounding LHS 1903, a small red dwarf star cooler and dimmer than our Sun. (European Space Agency) (CN) — For decades, astronomers thought they had ...

Planetary scientists have long debated where the material that formed Earth comes from. Despite its location in the inner solar system, they consider it likely that 6–40% of this material must have ...

For those who enjoy viewing the night sky, a unique opportunity is just around the corner late this month. Six planets in the solar system are going to align in the western sky just after sunset.

A rare planetary alignment featuring Mercury, Mars, Saturn, and Neptune will be visible this week. Here's when and how to watch the early-morning sky show from India.

Our solar system is a smashing success. A new study suggests that from its earliest period — even before the last of its nebular gas had been consumed — Earth’s solar system and its planets looked ...

When multiple planets appear to line up in the sky, it’s called a planetary parade. The planets don’t necessarily have to be in a single straight line, but will be located near each other on one side ...

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...