561–580 of 590 results

Spacecraft and Space Missions

Watch Curiosity Descend onto Mars

See through Curiosity's eyes as it descends to the surface of the Red Planet.

Astronomy & Observing News

The Curious Avalanches of Iapetus

Saturn's two-faced moon hosts extraordinary avalanches that cascade much longer than they should. Figuring out what makes them flow might help scientists better understand landslides on Earth.


Galaxy Zoo's Odd Black Holes

Citizen scientists are helping astronomers understand how galaxies and their resident supermassive black holes grow.

Astronomy & Observing News

A Peek Inside Sky & Telescope September 2012

Sky & Telescope's September 2012 issue is now available to digital subscribers. Some print subscribers may have already received it, and it's officially on-sale at newsstands starting September 1st.

Astronomy & Observing News

Ancient Spiral Galaxy Discovered

An ancient spiral galaxy offers another tantalizing clue to how nature might create these grand designs.

Astronomy & Observing News

Seeing "Dark" Galaxies

After years of failure, astronomers have finally succeeded in imaging primeval clouds of gas like those that existed before there were stars.

Astronomy & Observing News

Impossibly Aligned Galaxies

Astronomers have found an alignment of galaxies along our line of sight that’s so rare, it ought to be impossible. Is it just luck — or does it tell us something more?

Astronomy & Observing News

How to Grow a Supermassive Black Hole

A new study says most black holes may grow by snacking instead of collision-induced feeding frenzies.



A Windy Early Universe

Winds in the early universe could make radio observations of the first stars and galaxies a little easier, says a new study published in Nature.

Astronomy & Observing News

X-ray Telescope Launches Successfully

NuSTAR, the first telescope to focus high-energy X-rays, launched today after 20 years of planning.

Celestial News & Events

What is the Black-Drop Effect?

The famous (or infamous) black-drop effect earned its place in history long before astronomers knew what caused it.

Astronomy & Observing News

Exotic Objects Test Einstein’s Theory

Pulsars, supermassive black holes, and white dwarfs are all tools in astronomers' arsenals as they continue to push Einstein's theory of general relativity to its limits.

Astronomy & Observing News

Afghans Reach for the Stars

Reach for the Stars aims to bring astronomy back into Afghanistan’s elementary school curriculum in a way that resonates with the region’s culture and history.

Venus transits the Sun

Celestial News & Events

Where to See the Transit of Venus Online

Find out where you can view June 5th or 6th's transit of Venus online.

Astronomy & Observing News

Where to See the Annular Solar Eclipse Online

If you're not in the path of this weekend's “ring of fire” eclipse, find out where you can view it online.

Stellar Science

Superflares from Sun-like Stars

NASA's Kepler mission is finding solar-type stars that emit jaw-dropping explosions of high-energy particles and radiation. Now astronomers are looking into why some solar-type stars emit superflares — and why the Sun never will.

Solar System

IBEX's Slower Sun — and No Bow Shock

NASA's Interstellar Boundary Explorer has discovered that the Sun has no bow shock, overturning the basis for decades of scientific research.

Black Holes

X-ray Outburst in Spiral Galaxy M83

Astronomers have spotted an unusual "ultraluminous" burst of X-rays coming from the otherwise barren region between the grand spiral arms of Messier 83.

People, Places, and Events

S&T’s NEAF Round-Up

Sky & Telescope editors just returned from our annual pilgrimage to the Northeast Astronomy Forum, where we scoped out new products and talked with our readers.

Stellar Science

“Coronal Cells” in Sun’s Atmosphere

Astronomers have discovered an unexpected new feature on the Sun, leading to further insights about the solar magnetic field.