61–80 of 87 results

Stellar Science

Watch a Star Evolve in “Real Time”

The odd behavior of a star in the heart of the Stingray Nebula provides tantalizing evidence that we may be seeing, first-hand, its helium-shell flash: an explosive phase of nuclear burning at the end of a star’s life.

Exoplanets

Most “Earth-Like” Planet Found Yet

The newly discovered planet, Kepler-186f, is the first Earth-size exoplanet circling in its star’s habitable zone. The media worldwide is gleaming with fantastical headlines, but readers in the know may have an inkling the result is less than it seems.

Solar System

Drama at Saturn: The Birth (or Demise) of a Moonlet?

New images from NASA’s Cassini mission show bright spots along Saturn’s A ring, likely caused by a small moonlet in the process of forming or shattering.

Stellar Science

Supernova Remnant in Technicolor

Take a look at this supernova remnant from radio waves to x-rays to see multiple features of its bubble-like expanding shock wave. Supernovae — the dramatic explosions of massive stars ending their lives — can outshine their host galaxies for weeks, allowing them to be seen across millions of light-years…

Exoplanets

Hot Jupiters Keep Their Stars Young

Sizzling gas giants circling close to their host stars — so-called hot Jupiters — keep their host stars young and active, a new study suggests.

NorthEast Astronomy Forum in 2008

People, Places, and Events

Amateurs Flocking to NEAF this Weekend

The Northeast Astronomy Forum in Suffern, NY, will welcome visitors from across the world on April 12–13, 2014. Sky & Telescope will be there. Will you?

Cosmology

Quasars Track Expanding Universe

The most precise measurement yet of the Hubble parameter illuminates dark energy — the elusive entity that’s accelerating the universe’s expansion.

Solar System

The Subsurface Ocean of Enceladus

Data from NASA’s Cassini spacecraft have provided further evidence that Saturn’s tiny moon Enceladus harbors a liquid ocean under its surface.

Cosmology

A New Galactic Yardstick

Astronomers have developed a new method to measure distances to bright but faraway galaxies, a tool which will help better constrain the expansion rate of the universe.

Astrobiology

Fooling with the Universe

This year’s April Fools' provides a wealth of alarming results. Catch up on all the scientific shenanigans here.

People, Places, and Events

Celebrate the Night Sky This Month

Join the world’s largest celebration of astronomy — Global Astronomy Month — throughout April.

Solar System

Chariklo: An Asteroid with Rings

An international team of observers has made the surprising discovery that a distant asteroid has two distinct, dense rings.

Cosmology

Dark Matter Spotted in the Milky Way?

A team of astronomers claim to have the most compelling case for annihilating dark matter yet.

Solar System

Active Volcanoes on Venus?

New images of Venus show features that look like hot spots, hinting there may be active volcanoes on the planet today.

Milky Way

Young Stars Lead the Magellanic Stream

Astronomers have discovered hot, young stars in the Leading Arm of the Magellanic Stream, calling the history of the Magellanic Clouds once again into question.

Exoplanets

Planets Form With Magnetic Storms

Astronomers might have solved an outstanding mystery of why forming planetary systems emit more infrared light than expected. The key lies with gas and dust suspended in giant magnetic loops.

Solar System

Hubble Catches a Crumbling Asteroid

The Hubble Space Telescope has photographed a never-before-seen event: an asteroid breaking up into pieces.

Exoplanets

A Chaotic Planet-Forming Disk

A new map of Beta Pictoris reveals an asymmetric clump of carbon monoxide likely produced in cometary collisions. It provides a rare glimpse at the chaotic birth of a planetary system.

Milky Way

Fingerprinting the Circumgalactic Medium

A new study finds the space surrounding dwarf galaxies in the nearby universe to be shockingly pristine.

Exoplanets

Kepler's Planets by the Hundreds

Old data from NASA’s crippled Kepler space telescope has yielded a new windfall of confirmed exoplanets, nearly doubling the number tallied since 1992.

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