Rapid-response observations by major observatories shows that the first-known interstellar visitor is 10 times longer than it is wide.
The arrival of an object from beyond the solar system caught astronomers by surprise — but that doesn't mean that they were unprepared to study it.
Observations from NASA's MAVEN spacecraft reveal that the solar wind causes unexpected interactions with the Red Planet's weak magnetism.
As you'll hear in this month's astronomy podcast, Venus and Jupiter are putting on quite a show low in the east before dawn.
Telescopes only picked it up a week ago, but it's likely been traveling through interstellar space for millions of years.
A professional observatory in Greece has begun recording flashes created when bits of interplanetary debris strike the Moon.
You'd think scientists would have Saturn all figured out after watching it up close for 13 years. They don't.
When the distant dwarf planet Haumea briefly slipped in front of a star last January, astronomers found more than they expected.
After protests and a judge's ruling brought the colossal Thirty Meter Telescope project to a halt, a state panel has cleared the way for its construction atop Mauna Kea to proceed.
October's astronomy podcast helps you track down Saturn after sunset and offers a peek at what's in view before dawn.
If you loved seeing August's solar eclipse and are eager to see another one, don't miss this live webinar on upcoming total and annular solar eclipses.
Join renowned MIT researcher Sara Seager for a fascinating behind-the-scenes look at how we're readying the technology to find and study planets like Earth
A large Earth-approaching asteroid, now sailing near Earth, has a lumpy shape and is accompanied by a pair of tiny moonlets.
In September's astronomy podcast, you'll learn what's special about the ringed planet Saturn, now visible in the evening sky.
A challenging and intensive campaign by telescope-toting teams yields big-time results on the body that the New Horizons spacecraft will fly past in 17 months.
There's more to look for this month than the solar eclipse. As you'll discover in August's astronomy podcast, Jupiter and Saturn are easy to spot in the evening sky.
A team of amateurs observers, some armed with just 3-inch telescopes, have found that the main-belt asteroid 113 Amalthea probably has a small companion.
Jupiter and Saturn are easy to spot in the evening sky, as you'll discover in July's fun and informative astronomy podcast.
Are astronomers being misled about a possible ninth planet by the quirky alignment of orbits that they’re finding in the distant Kuiper Belt?
On June 3rd, two dozen teams of observers in South America and South Africa tried to learn something about distant 2014 MU69, which New Horizons will visit in early 2019.
Just a mile across, a pair of moonlets found orbiting Jupiter bring the planet's total satellite count to 69.
A Moon-orbiting camera briefly shuddered — then got back to work — when it was hit by a tiny bit of space rock no bigger than a pinhead.
June's astronomy podcast takes you on a star- and planet-studded tour of the sky you'll see after sunset.
Want to take your eclipse-photography experience to the next level? Get tips on advanced techniques from Fred Espenak, a.k.a. "Mr. Eclipse," during S&T's live webinar on Tuesday, May 23rd. There are now just three months to go until August 21st's total eclipse of the Sun. And, like me, you're probably wondering how much time and…
Sky & Telescope's third tour to this astronomical paradise in South America wowed its participants day and night. Here's what they saw!