An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

This finding explains the discrepancy between the number of basins detected on the Moon (~40) and the number predicted (~300) by an accretion scenario of planet formation.

Most of the dense material in the dust cloud is attracted strongly and ends up here. The inner four planets (Mercury, Venus, Earth, and Mars) are rocky and have solid surfaces that can be walked on.

Our home, planet Earth, is part of a system of bodies that orbit a central star – the Sun. This solar system consists of four inner rocky planets and four outer gas giant planets as well as an ...

An artist’s impression of a small, rocky interstellar object hurtling from the upper right toward the inner solar system. The orbits of the four inner planets (Mercury, Venus, Earth, Mars) are ...

Related: Giant 'kidney beans' spotted in Mars satellite images could point to signs of water and life Using computer models of the four ... the planet-like object swooping through the inner ...

It’s been pretty cold recently, so you may need to channel your inner polar bear to get a good view of the ongoing planetary ...