Advertisement
Astrophysics
Subscribe to Astrophysics

The Lead

Researchers discover cool-burning flames in space

July 28, 2014 2:04 pm | by Ioana Patringenaru, Jacobs School of Engineering | Videos | Comments

A team of international researchers has discovered a new type of cool burning flames that could lead to cleaner, more efficient engines for cars. The discovery was made during a series of experiments on the International Space Station by a team led by Forman Williams, a professor of mechanical and aerospace engineering at the Univ. of California, San Diego.

The source of the sky’s x-ray glow

July 28, 2014 8:02 am | by Nicole Casal Moore, Univ. of Michigan | News | Comments

In findings that help astrophysicists understand our corner of the galaxy, an international...

Highest-precision measurement made of water on an exoplanet

July 24, 2014 10:02 am | News | Comments

The discovery of water vapor in the atmospheres of...

A new approach in the search for extraterrestrial intelligence: Targeting alien polluters

July 23, 2014 11:09 am | by David A. Aguilar, Harvard-Smithsonian Center for Astrophysics | News | Comments

Humanity is on the threshold of being able to detect signs of alien life on other worlds. By...

View Sample

FREE Email Newsletter

NASA’s Fermi space telescope finds a “transformer” pulsar

July 23, 2014 9:19 am | Videos | Comments

In late June 2013, an exceptional binary containing a rapidly spinning neutron star underwent a dramatic change in behavior never before observed. The pulsar's radio beacon vanished, while at the same time the system brightened fivefold in gamma rays, the most powerful form of light, according to measurements by NASA's Fermi Gamma-ray Space Telescope. It was as if someone flipped a switch on the pulsar.

Peering into giant planets from in and out of this world

July 18, 2014 8:40 am | by Anne M. Stark, Lawrence Livermore National Laboraotry | News | Comments

Lawrence Livermore National Laboratory scientists for the first time have experimentally re-created the conditions that exist deep inside giant planets, such as Jupiter, Uranus and many of the planets recently discovered outside our solar system. Researchers can now re-create and accurately measure material properties that control how these planets evolve over time, information essential for understanding how these massive objects form.

NASA’s Van Allen probes show how to accelerate electrons

July 16, 2014 7:50 am | News | Comments

One of the great, unanswered questions for space weather scientists is just what creates two gigantic donuts of radiation surrounding Earth, called the Van Allen radiation belts. Theories abound, but probes sent by NASA have recently provided the first really strong confirmation of what's happening. For the first time, scientists can explain how the electrons are accelerated up to nearly the speed of light.

Advertisement

Sun-like stars reveal their ages

July 11, 2014 8:49 am | News | Comments

Defining what makes a star “sun-like" is as difficult as defining what makes a planet "Earth-like." A solar twin should have a temperature, mass and spectral type similar to our sun. We also would expect it to be about 4.5 billion years old. However, it is notoriously difficult to measure a star's age so astronomers usually ignore age when deciding if a star counts as "sun-like."

Astronomers discover seven dwarf galaxies

July 11, 2014 8:30 am | by Jim Shelton, Yale Univ. | News | Comments

Meet the seven new dwarf galaxies. Yale Univ. astronomers, using a new type of telescope made by stitching together telephoto lenses, recently discovered seven celestial surprises while probing a nearby spiral galaxy. The previously unseen galaxies may yield important insights into dark matter and galaxy evolution, while possibly signaling the discovery of a new class of objects in space.

NASA finds friction from tides could help distant Earths survive, thrive

July 10, 2014 8:56 am | by Elizabeth Zubritsky, NASA Goddard Space Flight Center | News | Comments

As anybody who has started a campfire by rubbing sticks knows, friction generates heat. Now, computer modeling by NASA scientists shows that friction could be the key to survival for some distant Earth-sized planets traveling in dangerous orbits. The findings are consistent with observations that Earth-sized planets appear to be very common in other star systems.

Mercury: A result of early hit-and-run collisions

July 9, 2014 11:02 am | by Nikki Cassis, Arizona State Univ. | News | Comments

Planet Mercury’s unusual metal-rich composition has been a longstanding puzzle in planetary science. According to a study published online in Nature Geoscience, Mercury and other unusually metal-rich objects in the solar system may be relics left behind by collisions in the early solar system that built the other planets.

Ocean on Saturn moon could be as salty as the Dead Sea

July 8, 2014 9:02 am | News | Comments

Scientists analyzing data from NASA’s Cassini mission have firm evidence the ocean inside Saturn's largest moon, Titan, might be as salty as the Earth's Dead Sea. The new results come from a study of gravity and topography data collected during Cassini's repeated flybys of Titan during the past 10 years. The finding may change some scientists' expectations for present-day life on the distant moon.

Advertisement

Physicists a step closer to finding mysterious cosmic ray sources

July 8, 2014 8:52 am | News | Comments

An observatory run by the Univ. of Utah has found a “hotspot” beneath the Big Dipper emitting a disproportionate number of the highest-energy cosmic rays. The discovery moves physics another step toward identifying the mysterious sources of the most energetic particles in the universe.

A young star's age can be gleaned from nothing but sound waves

July 7, 2014 9:42 am | News | Comments

Determining the age of stars has long been a challenge for astronomers. Recent experiments by researchers in Belgium show that “baby” stars can be distinguished from “adolescent” stars by measuring the acoustic waves they emit. This is because stars can vibrate due to sound waves bouncing inside, and those waves are detectable through subtle changes in stellar brightness.

Mining data archives yields haul of “red nuggets”

June 12, 2014 8:09 am | by David A. Aguilar, Harvard-Smithsonian Center for Astrophysics | News | Comments

The world of astronomy has changed. An astronomer used to have to travel to a remote location and endure long, cold nights, patiently guiding a telescope to collect precious photons of light. Now, a proliferation of online archives allows astronomers to make discoveries from the comfort of their own offices.

55-year-old dark side of the moon mystery solved

June 10, 2014 8:09 am | by A'ndrea Elyse Messer, Penn State Univ. | News | Comments

The "man in the moon" appeared when meteoroids struck the Earth-facing side of the moon creating large flat seas of basalt that we see as dark areas called maria. But no "face" exists on farside of the moon and now, Penn State Univ. astrophysicists think they know why.

Bringing new life to Laser Guide Star

June 9, 2014 10:54 am | by Breanna Bishop, Lawrence Livermore National Laboratory | News | Comments

Earlier this year, Lawrence Livermore National Laboratory engineering technical associate Pam Danforth applied 30 years of laser experience to an out-of-this-world problem—bringing new life to the Univ. of California's Lick Observatory Laser Guide Star. The Lick Observatory's Laser Guide Star is vital to astronomers because a natural guide star isn't always near an object they want to observe.

Advertisement

Surprisingly strong magnetic fields challenge black holes’ pull

June 5, 2014 8:13 am | by Kate Greene, Lawrence Berkeley National Laboratory | News | Comments

A new study of supermassive black holes at the centers of galaxies has found magnetic fields play an impressive role in the systems’ dynamics. In fact, in dozens of black holes surveyed, the magnetic field strength matched the force produced by the black holes’ powerful gravitational pull, says a team of scientists.

NASA snaps cosmic color portrait “and then some”

June 4, 2014 9:56 am | News | Comments

A new NASA panorama looking deep and far into the universe for the first time includes ultraviolet light, which is normally not visible to the human eye. It shows up in the photo as bright baby blue with spinning galaxies, which are about 5 to 10 billion years old. The photo is a composite of more than 800 photos taken by Hubble and shows about 10,000 multi-colored galaxies.

A habitable environment on Martian volcano?

May 28, 2014 8:25 am | by Kevin Stacey, Brown Univ. | News | Comments

The slopes of a giant Martian volcano, once covered in glacial ice, may have been home to one of the most recent habitable environments yet found on the Red Planet, according to new research led by Brown Univ. geologists. Nearly twice as tall as Mount Everest, Arsia Mons is the third tallest volcano on Mars and one of the largest mountains in the solar system.

Supernova caught in the act by Palomar Transient Factory

May 22, 2014 7:52 am | by Cynthia Eller, California Institute of Technology | News | Comments

Supernovae are incredibly energetic, dynamic events. It’s easy to imagine that they are uncommon, but the universe is a big place and supernovae are actually fairly routine. The problem with observing supernovae is knowing just when and where one is occurring and being able to point a world-class telescope at it in the hours immediately afterward, when precious data about the supernova's progenitor star is available.

“Smoking gun” evidence for theory that Saturn’s collapsing magnetic tail causes auroras

May 19, 2014 9:47 am | News | Comments

Researcher in the U.K. has recently shown that Saturn’s auroras are caused by the same phenomenon which leads to dramatic auroral displays on Earth. The finding originates in stunning new images of Saturn’s auroras as the planet’s magnetic field is battered by charged particles from the Sun.

Giant telescope tackles orbit, size of exoplanet

May 15, 2014 11:45 am | by Anne M. Stark, Lawrence Livermore National Laboraotry | News | Comments

Using one of the world's largest telescopes, a Lawrence Livermore National Laboratory team and international collaborators have tracked the orbit of a planet at least four times the size of Jupiter. The scientists were able to identify the orbit of the exoplanet, Beta Pictoris b, which sits 63 light-years from our solar system, by using the Gemini Planet Imager's next-generation, high-contrast adaptive optics system.

Diamond planets may be more common than astronomers thought

May 13, 2014 11:46 am | by Eric Gershon, Yale Univ. | News | Comments

Carbon-rich planets may be more common than previously thought, according to new research by Yale Univ. astronomers. Some of these planets, all located far beyond Earth’s solar system, could contain vast deposits of graphite or diamonds, and their apparent abundance prompts new questions about the implications of carbon-intense environments for climate, plate tectonics and other geological processes, as well as for life.

Study finds surprising clues about the formation of sun-like star clusters

May 9, 2014 11:15 am | News | Comments

An important advance in understanding how clusters of stars like our sun are formed has been made by a team that includes seven astronomers at Penn State Univ. and two at other universities. Using data from NASA's Chandra X-ray Observatory and infrared telescopes, the astronomers have shown that earlier theories about the process that creates star clusters in giant clouds of gas and dust cannot be correct.

Astronomers create first realistic virtual universe

May 7, 2014 2:43 pm | News | Comments

Move over, Matrix, astronomers at MIT/Harvard-Smithsonian Center for Astrophysics and the Heidelberg Institute for Theoretical Studies in Germany have done you one better. They have created the first realistic virtual universe using a computer simulation called "Illustris." Illustris can recreate 13 billion years of cosmic evolution in a cube 350 million light-years on a side with unprecedented resolution.

Entire star cluster thrown out of its galaxy

May 1, 2014 10:49 am | News | Comments

The galaxy known as M87 has a fastball that would be the envy of any baseball pitcher. It has thrown an entire star cluster toward us at more than two million miles per hour. The newly discovered cluster, which astronomers named HVGC-1, is now on a fast journey to nowhere. Its fate: to drift through the void between the galaxies for all time.

Dwarf fossil galaxy reveals new facts about early universe

May 1, 2014 8:04 am | by Peter Dizikes, MIT News Office | News | Comments

Out on the edge of the universe, 75,000 light-years from us, a galaxy known as Segue 1 has some unusual properties: It’s the faintest galaxy ever detected. It’s very small, containing only about 1,000 stars. And it has a rare chemical composition, with vanishingly small amounts of metallic elements present.

The intergalactic medium unveiled

April 30, 2014 8:13 am | by Cynthia Eller, California Institute of Technology | News | Comments

Caltech astronomers have taken unprecedented images of the intergalactic medium (IGM)—the diffuse gas that connects galaxies throughout the universe—with the Cosmic Web Imager, an instrument designed and built at Caltech. Until now, the structure of the IGM has mostly been a matter for theoretical speculation. However, with observations from the Cosmic Web Imager, astronomers are obtaining our first 3-D pictures of the IGM.

X
You may login with either your assigned username or your e-mail address.
The password field is case sensitive.
Loading