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Read news from the world of astronomy for the week of April 12, 2024.

New research suggests Exoplanet K2-18b may not have a habitable surface. Plus, read our reports from the total solar eclipse. And learn about how to observe the next eclipse in 2026.

Latest News

The Planet K2-18b May Not Be Habitable After All

New research suggests Exoplanet K2-18b may actually be a gas-rich planet with no habitable surface instead of a habitable water world.

Observing Highlights

This Week's Sky at a Glance, April 12 – 21

Mars and Saturn are low in the dawn. Watch them widen in the coming days until they shine on opposite sides of the sky by late fall.

Plan Now for the 2026 Total Solar Eclipse in Europe

On August 12, 2026, a total solar eclipse will be visible across Greenland, Iceland, and Spain, with plenty of inspiring itineraries.

April Podcast: Planets in Transition

April’s evening skies offer plenty of stars to check out. However, aside from Jupiter low in the west, planets are in short supply. Our latest Sky Tour podcast helps you track down Mars, Saturn, and much more during April.

Lifesavers Series: Preventing the End of the World

Dr. Nancy Chabot, Coordinated Lead on NASA's DART mission, will give a lecture on May 9, 2024, 6:30-8:30 p.m. at the Vilna Shul in Boston, MA, and online. The DART mission successfully demonstraited a method of asteroid deflection by kinetic impact, which could help to protect Earth from potential asteroid impacts in the future.

Experiencing Totality: S&T’s Eclipse Stories

With Sky & Telescope’s editors and writers scattered across the eclipse path, we have dozens of stories to share. Here are a few.

The Great 2024 Eclipse Guide

The Great 2024 Eclipse is a 64-page, full-color illustrated guide to the April 8, 2024, total solar eclipse. Everything you need to prepare for this awe-inspiring event is at your fingertips in this special issue.