Sentences with phrase «nearby supernova»

IceCube sensitivity for low - energy neutrinos from nearby supernovae.

Two nearby supernovae explosions may have increased cancer rates and changed the behaviour of early humans - but that's a pretty big may

«CAT scan of nearby supernova remnant reveals frothy interior.»

Each stretches tens of light - years across and three are associated with nearby supernova remnants.

Preliminary surveys of relatively nearby supernovas in the late 1980s and early 1990s showed that Type Ia supernovas are not identical after all.

A direct comparison can thus be made, Hoscheit says, between the «cosmic» determination of the Hubble Constant and the «local» determination derived from observations of light from relatively nearby supernovae.

A new analysis of nearby supernovae suggests space might not be expanding as quickly as it once was, a tantalising hint that the source of dark energy may be more exotic than we thought.

In any case, any developing carbon - based life on a developing Earth - type planet would be subject to tremendous heat on a newly formed planet that is under intense asteroidal and cometary bombardment, in addition to the intense and deadly radiation produced by nearby supernovae and other massive young stars.

That flare - up hinted at the unparalleled information nearby supernovas could provide.

Now, using precise chemical measurements of seafloor rock and moon samples, scientists have shown that nearby supernovas rained down radioactive iron and potentially influenced life on Earth.

To our surprise we found that although nearby supernovae or large asteroid impacts would be catastrophic for people, tardigrades could be unaffected.

«If the cosmos had been expanding rapidly, the redshifts of distant supernovae would be more pronounced when compared to the light emanating from nearby supernovae.

Measurements based on the cosmic microwave background, the earliest light in the universe, suggest one rate of expansion, while measurements of nearby supernovas suggest a faster one.

By comparing the brightness of distant, far - away supernovae with the brightness of nearby supernovae, the scientists discovered that the far - away supernovae were about 25 percent too faint.

The reason for that is that a void — with far more matter outside the void exerting a slightly larger gravitational pull — will affect the Hubble Constant value one measures from a technique that uses relatively nearby supernovae, while it will have no effect on the value derived from a technique that uses the cosmic microwave background (CMB), the leftover light from the Big Bang.

2) The nebula began a contraction that may have been triggered by the shock wave of a nearby supernova.

A new influx of metalrich dust to the solar system, perhaps from a nearby supernova, would have augmented isotopes in the outer asteroids but not the inner ones.

A big next step, scientists say, is to observe a nearby supernova or the collision of neutron stars via both gravity waves and light.

A good example is the Nearby Supernova Factory, an experiment that has turned up more than 500 Type Ia supernovas to help explore the nature of dark energy.

Using elaborate computer simulations, a team of researchers from RIKEN in Japan and the Max Planck Institute for Astrophysics (MPA) were able to explain the recently measured spatial distributions of radioactive titanium and nickel in Cassiopeia A, a roughly 340 year old gas remnant of a nearby supernova.

The savannahs early hominins occupied might have appeared thanks to a spate of wildfires 8 million years ago — which might in turn be linked to a nearby supernova

Perhaps a nearby supernova swept a lot of gas out of the black hole's reach.

But scientists don't know which of the three neutrinos is the lightest; a nearby supernova could answer that question.

Shortly after a burst of neutrinos from a nearby supernova, the detector could direct astronomers to zero in on a few degrees of sky.

Galactic Ice Age Threat When a colleague asked him how a nearby supernova blast might affect life on Earth, astrophysicist Nir Shaviv of the Hebrew University of Jerusalem thought he knew what to expect: a lot of mutations from radiation.

The cloud may even be much closer than most astronomers think and be part of the debris of a nearby supernova.

The discovery is Nobel - caliber stuff, some physicists say, as, except for a burp from a nearby supernova explosion in 1987, neutrinos from the far reaches of the cosmos had eluded capture.

Within six months the optical astronomers were joining in, particularly searching for a pulsar in the Crab nebula [the remains of a nearby supernova whose explosion was seen in A.D. 1054].

However, he maintains that a nearby supernova explosion may have fertilized the solar system's embryonic cloud with some radioactive isotopes as well.

When our solar system was nothing but a cloud of gas and dust, what was likely a shock wave from a nearby supernova bounced up against it and caused it to collapse.

«That in itself rules out some possible candidates, such as long gamma - ray bursts and nearby supernovae,» said team member Dr Mansi Kasliwal of the Carnegie Institution in Pasadena, California.

So he and his collaborators ran small - scale, high - resolution simulations of the chemical enrichment of a dark matter halo via metals from a nearby supernova explosion after partial evaporation by the progenitor star.

«We have found a remarkably large dust mass concentrated in the central part of the ejecta from a relatively young and nearby supernova,» said Remy Indebetouw, an astronomer at the National Radio Astronomy Observatory (NRAO) and the University of Virginia, both in Charlottesville, USA.

Cosmic rays are thought to come from either the center of the galaxy or a nearby supernova, and knowing which is true will help astrophysicists paint a more accurate picture of the cosmos.

Other discoveries in the Milky Way detailed in the special edition include the sharpest image yet of a gamma ray source — a nearby supernova remnant — which will enable researchers to study this object at finer scale than before — and three new «gamma ray shells» that are possibly examples of a new type of supernova remnant.

«We believe that the Solar System received an extra slug of radioactive aluminum and iron from a nearby supernova explosion at the time Vesta was forming,» explains Russell.

«The formation of our own Sun and planets probably was heavily influenced, if not triggered, by a nearby supernova explosion,» Lockman said.

A new study challenges the idea that a nearby supernova forced the formation of our solar system.

Shogo Tachibana et al., «60Fe in Chondrites: Debris from a Nearby Supernova in the Early Solar System?»

It is suggested that the Sun is a third generation star, whose formation may have been triggered by shockwaves from a nearby supernova based on a high abundance of heavy elements such as gold and uranium in the solar system.