The cover of the September 2022 issue

Cosmic Triplets, DART, and Fast Radio Bursts

In the September 2022 issue of Sky & Telescope, we’re seeing triple. We scoured the cosmos for three-of-a-kinds to bring you some incredible celestial triplets from lunar craters to star clusters and even galaxies. Then, we’re finally setting the story straight six decades after the discovery of Neptune. Despite longstanding national tensions over this discovery, it may have been the result of pure luck. One thing we don’t want to leave up to chance any longer is planetary defense. Join us as NASA gets ready to be the first to alter the motion of a celestial body. This proof of concept might one day help astronomers protect Earth.


Smash and Nudge

This year, the DART mission will make humanity’s first perceptible impact on the motion of a celestial body. The result might help us someday avert our potential annihilation by asteroid.

By Benjamin Skuse

Seeing Triple

Good things come in threes. Feast your eyes on these celestial triplets.

By Jerry Oltion

Fast Radio Bursts Hit Prime Time

Less than two decades after their discovery, these cosmic flashes have revealed much about their nature — but we still debate how they’re created.

By Shivani Bhandari

Discovering Neptune: What Really Happened?

New research reveals that the popular story accepted for six decades is not quite right.

By Trudy E. Bell

Star Power

Taking special care of the stars in your astrophoto will make the entire image shine.  

By Ron Brecher

Beyond the Printed Page:

The Milky Way’s Central Black Hole

Read all about the first image of Sagittarius A*.

What’s Observable?

Use NASA’s tool to learn what asteroids and comets are observable on any given date.

Center for Near Earth Object Studies

See NASA’s table of potential future Earth impact events by object.

The Supernova Early Warning System

Sign up for alerts from SNEWS to be among the first to know when the next galactic supernova lights up the sky.


Visiting the House of Cepheus

This circumpolar constellation is full of fascinating finds.

By Fred Schaaf

A New, Old Jupiter

September is a good time to explore the solar system’s biggest planet.

By Bob King

A Lingering Jovian Mystery

What caused a bright flash on Io in 1983?

By Thomas A. Dobbins

Cygnus on the Wing

The heavenly swan, in flight along the Milky Way, is a celestial wonderland.

By Ken Hewitt-White

Table of Contents

See what else September’s issue has to offer.


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