A European-Japanese spacecraft has beamed back some of the best close-up photos yet of Mercury's north pole as part of only the second human survey of our solar system's innermost planet.

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 may explain the strange properties of the orbits of our solar ... system some 4 billion years ago and warped the orbits of many planets. More NASA, ESA, Caltech / ISTOCK / GETTY IMAGES ...

Jess Thomson is a Newsweek Science Reporter based in London UK. Her focus is reporting on science, technology and healthcare. She has covered weird animal behavior, space news and the impacts of ...

These embryos, somewhere between small planetesimals and fully formed planets, were abundant during the solar system's formative stages and played a critical role in planetary formation.

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

Getty Images The different orbital speeds of the planets in our Solar System means several of them can occasionally line up in the same part of the sky at the same time (Credit: Getty Images ...

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. The world will witness a rare sighting in the sky in late ...

Welcome to this month’s edition of “What’s up in the sky?” February has a nice lineup of planets and some eye-catching ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

A European-Japanese spacecraft has beamed back some of the best close-up photos yet of Mercury's north pole as part of only the second human survey of our solar system's innermost planet. The ...