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

This understanding was used as a metaphor for what happens within our inner worlds when a planet ... 2024-February 4, 2025 When planets are in retrograde, the world around us continues to move ...

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.

"How would that affect the inner planets, so Venus, Earth, and Mars, specifically?" According to Chen, since the discovery of the first exoplanet in 1992, researchers have wondered how common ...

To tackle this puzzle, Malhotra and colleagues considered a less-examined scenario: that a visiting star-size object tweaked these planets' paths around 4 billion years ago. Related: Giant 'kidney ...