Sentences with phrase «in supernovae more»

Rather, they analyzed microscopic silicon carbide, SiC, dust grains that formed in supernovae more than 4.6 billion years ago and were trapped in meteorites as our Solar System formed from the ashes of the galaxy's previous generations of stars.

Not exact matches

And this is the optimistic version of impending Armageddon, writes Aeon's Ross Anderson — barring a more sudden end in the form of a cosmic collision or supernova shockwave.

- Comment A supernova of activity, relatively speaking, in the wine industry last week has sent our wine commentator, Chris Losh, in... read more

In the Dec. 9 SN: Lessons from the Pliocene, searching for new ways to fight MS, a supernova on repeat, the great gene drive debate, spider sleep secrets, an ailing boy gets new skin, kleptopredation and more.

Riess has since hunted down supernovae that exploded more than 7 billion years ago, filling in gaps: The universe first slowed down as the inward pull of matter dominated over the relatively mild outward push of dark energy.

This effect becomes even more apparent as the shock collides into the equatorial ring, as observed in Hubble Space Telescope images of the supernova.

After running a number of computationally intensive simulations of supernova light at the National Energy Research Scientific Computing Center (NERSC), a Department of Energy Office of Science User Facility located at Berkeley Lab, Goldstein and Nugent suspect that they'll be able to find about 1,000 of these strongly lensed Type Ia supernovae in data collected by the upcoming Large Synoptic Survey Telescope (LSST)-- about 20 times more than previous expectations.

Penn State University astronomers have discovered that the mysterious «cosmic whistles» known as fast radio bursts can pack a serious punch, in some cases releasing a billion times more energy in gamma - rays than they do in radio waves and rivaling the stellar cataclysms known as supernovae in their explosive power.

In the past few years, astronomers have solidified the case for cosmic acceleration by studying ever more remote supernovae.

The results resolve some of the questions regarding the supernova - GRB connection, but it remains unclear how a single mechanism can produce supernovae and the much more powerful GRBs in the distant universe.

More common lower - energy cosmic rays — thought to emerge in the aftermath of supernova explosions in the Milky Way — curve so much in the galaxy's magnetic field that they appear to come from all over the sky.

The Hubble Space Telescope's recent discovery of the earliest known Type Ia supernova from more than 10 billion years ago, plus other results, favor a scenario in which two white dwarfs merge.

Gravity from a galaxy (box) in this Hubble Space Telescope image bends light from a more distant supernova, creating four images of the exploding star (arrows).

Although more than a thousand supernovae have been observed by optical astronomers, the early x-ray glow from the explosions has been detected in less than a dozen cases.

Such grains originated more than 4.6 billion years ago in the ashes of Type II supernovae, typified here (upper left) by a Hubble Space Telescope image of the Crab Nebula, the remnant of a supernova explosion in 1054.

New work from a team of Carnegie cosmochemists published by Science Advances reports analyses of carbon - rich dust grains extracted from meteorites that show that these grains formed in the outflows from one or more type II supernovae more than two years after the progenitor stars exploded.

In the Feb. 18 SN: Anniversary of a celebrity supernova, readying for the next stellar explosion, human - animal chimeras, hottest year on record, molecules tied in knots, cancer results don't reproduce and morIn the Feb. 18 SN: Anniversary of a celebrity supernova, readying for the next stellar explosion, human - animal chimeras, hottest year on record, molecules tied in knots, cancer results don't reproduce and morin knots, cancer results don't reproduce and more.

An international collaboration led by the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) have discovered that the color of supernovae during a specific phase could be an indicator for detecting the most distant and oldest supernovae in the Universe — more than 13 billion years old.

In that case, faraway supernovas (which we see as they were billions of years ago, when the growth was more rapid) would have accumulated redshift more quickly relative to their distance than nearby ones.

If so, large - scale supernova surveys could turn up more of these invisible lenses, helping astronomers find and put limits on the number of dark - matter dwarfs in the universe, Quimby and colleagues conclude.

In the more dense medium near the Milky Way's center, however, a much larger explosion — 10 to 100 times a typical supernova — would be necessary to displace the same amount of gas.

Supernovas are also important to the life of the universe — and more specifically, to life in the universe.

Swept up in the Sloan's relentless gaze are stars, galaxies, supernovas, nebulas, and more — over 350 million celestial objects in total — adding up to the most complete census of the universe ever conducted.

With more than 300 billion stars in the Milky Way, astronomers expect to observe a supernova about three times every century.

The team's simulations show, perhaps not surprisingly, that potentially habitable planets are more likely to remain so if they form in areas far from dense conglomerations of stars, where more supernova explosions occur.

«We are now fully confident that one of the most popular supernova remnants detected in our galaxy was produced by an ordinary type Ia supernova that was first detected more than 400 years ago,» write Andrea Pastorello of Queen's University Belfast and Ferdinando Patat of the European Southern Observatory in Germany in a commentary on the study.

Those objects are produced in supernovae, and CCCP has now found several more possible neutron stars.

A detailed survey of the so - called Carina Nebula, a star - forming region relatively close to our solar system, is turning up evidence that numerous stars have already gone supernova there, and that many more may do the same in the millions of years to come.

In fact, astronomers may have already unknowingly detected this effect, because they've observed that the peak brightness of what should be uniformly luminous supernovae varies more from explosion to explosion in isolated galaxies, which are more likely to lie on the edge of a void, than in galaxies residing in clusterIn fact, astronomers may have already unknowingly detected this effect, because they've observed that the peak brightness of what should be uniformly luminous supernovae varies more from explosion to explosion in isolated galaxies, which are more likely to lie on the edge of a void, than in galaxies residing in clusterin isolated galaxies, which are more likely to lie on the edge of a void, than in galaxies residing in clusterin galaxies residing in clusterin clusters.

Yet it has none of the other signatures of a freshly blown - up star: the gas isn't moving very quickly and the elements visible in it are typical of those found in more mature supernova remnants.

Andrew Howell, a staff scientist with the Las Cumbres Observatory Global Telescope Network in Santa Barbara, Calif., says that alternative origins for type Ia supernovae are becoming more compelling.

Cosmologists typically focus on the large - scale properties of the universe as a whole, such as galaxies and intergalactic medium; while astrophysicists are more interested in testing physical theories of small - to medium - sized objects, such as stars, supernovae and interstellar medium.

Previous observations of superluminous supernovae found they typically reside in low - mass or dwarf galaxies, which tend to be less enriched in metals than more massive galaxies.

This is about a hundred times as much energy as that released in the brightest supernova explosion, and is many times more than the amount needed to explain the origin of the bursts of gamma rays.

But as astronomers report online today in Nature, the galaxy is losing more gas than this — between three and 30 solar masses per year — as winds, radiation pressure, and supernova explosions from the starburst itself drive gas away.

For a brief burst of time, supernovae can radiate more energy than the sun will emit in its lifetime.

But if approved, K2 will be looking at a much more diverse region of sky with a wide range of astronomical and astrophysical phenomena: planets with short orbits around cooler stars (which, if in their star's habitable zone, could still harbor water); young, still - forming proto - stars, which could provide insight into star and planet formation; and supernovae and galaxy clusters.

Type 2 supernovas occur more frequently, perhaps once every 91 years in a galaxy [source: Ronan].

We find good agreement in the regions of ove... ▽ More We derive an accurate mass distribution of the galaxy cluster MACS J1206.2 - 0847 (z = 0.439) from a combined weak - lensing distortion, magnification, and strong - lensing analysis of wide - field Subaru BVRIz» imaging and our recent 16 - band Hubble Space Telescope observations taken as part of the Cluster Lensing And Supernova survey with Hubble (CLASH) program.

In other cases, in which the mass of the star is several solar masses or more, the star may explode as a supernovIn other cases, in which the mass of the star is several solar masses or more, the star may explode as a supernovin which the mass of the star is several solar masses or more, the star may explode as a supernova.

Pulsar phenomena apparently last much longer than the observable supernova remnants in which they were born, since well more than 2,500 pulsars have been cataloged and only a few are associated with well - known remnants.

Astrophysicists keenly study supernovae not only to understand the mechanics of stars, but also to learn more about the abundance of elements in the cosmos, the heavier varieties of which are created by these uncommon events.

In more massive stars, this cycle of events can continue, with the stellar core reaching ever - higher temperatures and fusing increasingly heavy nuclei, until the star eventually experiences a supernova explosion (see below Evolution of high - mass stars).

Supernovas pack a lot of punch, to put it lightly — they can outshine galaxies and expel more energy than our Sun's lifetime output, making them the largest explosions in space.

They are thus probably more similar to galaxies in the early Universe when there had been less time for stars to produce the heavy elements and then return them to their surroundings through supernova explosions.

In practice there is a range of luminosities for the Type Ia, but the luminosity can be derived from the rate at which the supernova brightens and then fades — the more luminous ones take longer to brighten and then fade.

Stars much more massive than the Sun end their normal lives in violent supernova explosions, leaving behind an extremely dense neutron star.

In 2003, astronomers announced that they had discovered that iron from supernovae of the first stars (possibly from Type Ia supernovae involving white dwarfs) indicate that «massive chemically enriched galaxies formed» within one billion years after the Big Bang, and so the first stars may have preceded the birth of supermassive black holes (more from Astronomy Picture of the Day, ESA, and Freudling et al, 2003).

Estimating both the distance and recession speed of ancient Type - Ia supernovae allow astronomers to calculate the expansion of the universe, back during an era when matter in the universe was still relatively dense and expansion was still slowing under the influence of gravity and before its later hypothesized, subsequent acceleration from a mysterious repulsive force (more from NASA's Observatorium and NERSC's press release).

Indeed, GRBs appear to emit produce even more energy than supernovae or even quasars (which are energetically bright accretion disks and bi-polar jets around supermassive black holes that are most commonly found in the active nuclei of some distant galaxies and possibly even in the pre-galaxy period after the Big Bang).