Magazine | Page 17 of 281 | Astronomy.com

The assembled scope was small, light, and essentially useless.

Telescopes and Equipment

Are cheap telescopes worth it? The answer is no.

Illustration of a kilonova

Is gravity instantaneous?

A spectacle of sparkling stars and shining planets dance in hues of yellow, orange, and blue, as if creating a painting made by nature during the transition from civil twilight to nautical twilight.

Discover the three kinds of twilight

Stunning celestial sights such as the Milky Way under clear skies require absolutely zero magnification at all.

Observing Basics

Strange Universe: Zero-power love affair

A close-up image of M51 properly calibrated.

Observing Basics

Observing Basics: Coming to terms

The Large Hadron Collider at CERN

Does E = mc^2 hold true for dark matter and dark energy?

Mars is a dynamic world that continues to intrigue us. This image, captured by the Hubble Space Telescope, shows the planet wreathed in late-afternoon clouds.

Robotic Spaceflight

Experience Mars in 3D

The author’s photo-illustration attempts to capture the unusual appearance of totality, as seen during the April 20, 2023, hybrid solar eclipse near Com, East Timor.

The Moon, The Sun

Secret Sky: A topsy-turvy eclipse

Constellation Perseus

Deep-Sky Objects

Binocular Universe: Heroic treasures

Jupiter and its Galilean moons

Sky This Month: November 2023

This artist’s impression shows how ULAS J1120+0641, a very distant quasar powered by a black hole with a mass two billion times that of the Sun, may have looked. This quasar is the most distant yet found and is seen as it was just 770 million years after the Big Bang. This object is by far the brightest object yet discovered in the early Universe.

What we’ve learned in 60 years of studying quasars

Equations.

10 top equations in astronomy