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Is this the first known binary system to produce two supernova remnants?

FCC approves Reflect Orbital filing for mirror in space

Astrophotography, Observing Basics

Observing Basics: Astrophotography without a scope

An artist's illustration of two stars against a dense, starry background with red and blue nebula clouds. A large, intensely bright white star dominates the left side of the image, while a smaller, vivid blue star glows to its right, suggesting a binary star system.

How can a young blue giant have a white dwarf companion star that’s billions of years older?

Picture of the Day

A small, bright teal-green fuzzy ball glows near the center of a dense starfield. A hair-thin straight line of light runs horizontally across the whole frame, passing through the green ball on both sides. The background holds many colorful pinpoint stars and faint brownish haze, with one bright orange star to the right.

Tempel’s trail strengthens

Chris Schur, taken from Happy Jack, Arizona

Comet 10P/Tempel 2’s needle-thin dust trail stands out starkly in this image captured earlier this month as the comet was crossing Capricornus, heading toward its Aug. 2 perihelion. This trail of dust is not a traditional comet’s tail, directly blown out by the Sun — rather, it’s dust that has built up in its orbit over time. Such features were first detected throughout our solar system in 1983 by NASA’s Infrared Astronomical Satellite (IRAS), with Tempel 2’s being one of the first. The imager captured one hour of exposure in LRGB filters with an 11-inch f/2.2 astrograph.

In the Sky

A simulated telescopic view of Saturn on July 22, 2026, at 2 A.M. EDT. Saturn is shown with its rings visible near the center of the frame. Titan appears as a bright golden dot in the upper right, while Dione is positioned just above the rings to the left of the planet, Tethys is to the left, and Rhea is farther out to the left. A 30-arcsecond scale bar appears at the bottom right.

The Sky Today on Wednesday, July 22: Dione passes north of Saturn

What’s Launching This Week

What’s Launching This Week

A robotic satellite servicer and Starship’s return headline this week’s launches

Today in the History of Astronomy

A monochromatic ink drawing shows a small, winged cherub sitting on a grassy shore on the left and looking through a long telescope pointed toward the sky. In the background, a flat-topped mountain rises behind a coastal town with several sailing ships anchored in the harbor. In the upper sky, a figure rides a chariot pulled by two winged serpents beneath simple diagrams of celestial bodies.

Today in the History of Astronomy

July 22, 1826: Fr. Giuseppe Piazzi dies

More News

Underappreciated Serpens

The best comets this century

The Moon as it will appear on July 20, 2026

Sky This Week, The Sky This Week

The Sky This Week from July 17 to 24: Lunar time travel

Robotic Spaceflight, Solar System

Tianwen-2 arrives at target asteroid Kamoʻoalewa

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