Searching for the universe’s background glow
The cosmos is awash in the faint light of the extragalactic background. Where does it all come from?
Watch a gamma ray travel from its source in a faraway galaxy, through the extragalactic background, and finally to Earth, where the Fermi telescope can measure it.
A fresh look at Mars
Seven spacecraft continue to scour the Red Planet for signs of ancient water and conditions conducive to life.
An armada of spacecraft continues to explore the Red Planet, revealing deep-held secrets and raising new mysteries.
The next generation of mega telescopes promises to democratize astronomy, but aging national observatories must redefine their relevance to survive the revolution.
Astronomers will make a 3-D map of the universe thanks to sound waves from the beginning of time called baryon acoustic oscillations.
Finding our place in the Milky Way
Aristarchus and Copernicus were the first to challenge Earth’s position at the center of creation but certainly weren’t the last.
Witness totality from Indonesia
A spectacular adventure awaits those who tour Bali and see the March 9, 2016, total solar eclipse.
Target asteroids with your binoculars
Seeing small objects through small optics is easier than you might think.
These targets are all brighter than 10th magnitude, so you can observe them easily with both eyes.
Tour 10 fall binocular treats
Take your binoculars to a dark site this season, and you’ll enjoy a night of easy observing.
Grab your binoculars and point them at a famous star, several open clusters, a globular cluster, and an enigmatic galaxy.
Ease of use, extreme portability, and a great price make this Hydrogen-alpha solar filter one to consider.