Sandhya Ramesh

The size of Planet Nine, next to Earth and Neptune. PlanetUser/Wikimedia Commons, CC BY-SA 4.0

Why Astronomers Are Arguing Over ‘Planet Nine’, Which They Haven’t Observed Yet

Potentially Habitable Exoplanet Found Close Enough for Us to Study Its Atmosphere Soon

The Two NASA Missions That Will Study Rocky Fossils of a Younger Solar System

Credit: Ita Mehrotra

A Brief History of Earth: The Rock From Space That Wiped Out the Dinosaurs – and Much Else

TeamIndus's Eca rover. Credit: TeamIndus

In Twist to Moon Race, ISRO Will Fly TeamIndus Rover Together With Its Competitor’s

The supermoon of March 19, 2011 (right), and an average moon of December 20, 2010 (left). Credit: Marco Langbroek/Wikimedia Commons

Tonight’s Supermoon Will Be the Biggest in 68 Years – a Watcher’s Guide

Comet 67P/C-G, which the probe Rosetta will speed into on September 30. Credit: Rosetta NAVCAM/ESA

Live: The Final Moments of Rosetta, the Comet-Trailing Probe