Sentences with phrase «occurring in supernovas»

Dr. Stanislav Adamenko, the laboratory's scientific director, believes that these experiments are microscopic analogs of events occurring in supernovas and other phenomena involving Z - pinched electrical pulses.36

But scientists still argue about whether the r - process occurs in supernovas or when neutron stars merge with one another.

Not exact matches

Ripples in space time have already been observed when hyper - violent events, such as stars collapsing into black holes or supernova explosions, occur.

This should lead to tremendous advances in time - domain astronomy: studying fast - changing phenomena as they occur — black holes being born, supernovas exploding — as well as locating potentially Earth - threatening asteroids and mapping the little - understood population of objects orbiting out beyond Neptune.

Nuclear fusion of heavy elements (absorbing energy) occurs in the extremely high - energy conditions of supernova explosions.

Kersten and Smirnov, however, show that this decoherence effect does not have any impact on the experimental measurement of the oscillation probability for each neutrino flavour; they only demonstrate this result in cases that are similar to, albeit simpler, than what happens in a supernova, where collective effects occur.

Scientists estimate that a supernova occurs in our galaxy a few times a century.

Initially, Schmidt and his colleagues applied their technique only to supernovae that occurred in galaxies which are relatively close to our own.

If that occurs, then it would suggest that supernovas in general may not be able to distribute the dust they create into their surroundings.

To check the value of the Hubble constant that they have obtained from a single object, Schmidt and his colleagues plan to apply their technique to other type II supernovae that have occurred in distant galaxies.

Extremely bright exploding stars, called superluminous supernovae, and long gamma ray bursts also occur in this type of galaxy, he noted, and both are hypothesized to be associated with massive, highly magnetic and rapidly rotating neutron stars called magnetars.

This makes it the nearest optical supernova in two decades and potentially the closest type Ia supernova to occur during the life of currently operating space missions.

[3] Type Ia Supernovae occur when an accreting white dwarf in a binary star system slowly gains mass from its companion until it reaches a limit that triggers the nuclear fusion of carbon.

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.

But in a paper in the 4 April issue of Nature, a team led by James Reeves of the University of Leicester, U.K., reports findings that challenge the collapsar theory's assertion that the burst and supernova occur simultaneously.

Prior to the discovery, the closest astronomers had come to witnessing a supernova's x-ray outburst was in 1987, when researchers saw strongly ionized gas around a supernova in the Large Magellanic Cloud, which implied that a powerful blast of x-rays had occurred.

The Crab pulsar, created in a supernova explosion that occurred in 1054 A.D., is located at a distance of about 6500 light years at the center of a magnetized nebula visible in the Taurus constellation.

«The current idea is that a low - metal environment is important in creating superluminous supernovae, and that's why they tend to occur in low mass galaxies, but DES15E2mlf is in a relatively massive galaxy compared to the typical host galaxy for superluminous supernovae,» said Pan, a postdoctoral researcher at UC Santa Cruz and first author of the paper.

Also, he points out, if there is a huge population of stars outside galaxies, we should see a noticeable number of supernovas occurring out in the middle of nowhere as those rogues stars die.

On average, a Type 1 supernova occurs in a galaxy once every 140 years [source: Ronan].

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

Supernova 1987A occurred in the Large Magellanic Cloud, a galaxy only 160,000 light years from Earth.

They further argue that the estimated distance of the supernova thought to have occurred roughly 2.6 million years ago (which may have blasted Earth's surface with enough radioactive debris to influence its climate) should be cut in half.

While poring over historical observations of the star, they also made another striking discovery: This star hasn't survived one supernova; it appears to have also survived a supernova that occurred over half a century before, in 1954!

The supernova explosion that produced the Crab pulsar occurred in the year 1054 and was documented by Chinese astronomers.

However, until 2006, scientists believed the Milky Way's most recent supernova occurred in the late 1600s [source: Goddard Space Flight Center].

supernova type 2 (plural: supernovae or supernovas) A condition that occurs when nuclear fusion can no longer continue in the core of a massive star.

Similar to other galaxies, there occur supernovae in the Milky Way at irregular intervals of time.

«There are also two other classes of extreme events — long duration gamma - ray bursts and superluminous supernovae — that frequently occur in dwarf galaxies, as well.

Novae, which are significantly less luminous than supernovae, are cataclysmic nuclear explosions that occur on the surface of a white dwarf in a binary system.

«The reason some galaxies have the appearance that they do today is in large part because of the supernovas that have occurred in them,» he said.