Sentences with phrase «nearby supernovas in»

Not exact matches

The supernova, known as SN1987A, was first seen by observers in the Southern Hemisphere in 1987 when a giant star suddenly exploded at the edge of a nearby dwarf galaxy called the Large Magellanic Cloud.

Thanks to new detectors that can pick up neutrino signals and even gravitational waves, scientists will be ready when the next nearby star explodes, Emily Conover reported in «Waiting for a supernova» (SN: 2/18/17, p. 24).

«Caught in the act: Astronomers find a rare supernova «impostor» in a nearby galaxy.»

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.

«Massive fails» like this one in a nearby galaxy could explain why astronomers rarely see supernovae from the most massive stars, said Christopher Kochanek, professor of astronomy at The Ohio State University and the Ohio Eminent Scholar in Observational Cosmology.

Pulsars form when stars at least 1.4 times larger than our sun blow up in supernovas; these powerful explosions usually knock nearby stars out

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

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 process could be used to detect supernovas as well — if a supernova explodes nearby, scientists could spot its neutrinos scattering off nuclei in their detectors.

In the early 2000s, when looking for other objects in a nearby galaxy, he and his colleagues captured an image filled with the echoing light of three known supernovaIn the early 2000s, when looking for other objects in a nearby galaxy, he and his colleagues captured an image filled with the echoing light of three known supernovain a nearby galaxy, he and his colleagues captured an image filled with the echoing light of three known supernovas.

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

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.

Rob Beswick, a co-author of the research paper from the University of Manchester's Jodrell Bank Centre for Astrophysics added: «The explosion of a Type Ia supernova is a rare event in the nearby Universe.

Supernova explosions in older, nearby galaxies, says Lee, may have fertilized the nascent Milky Way — and in particular its center — with some of the heavy elements we now find here.

Nearby, large stars erupt in cataclysmic supernova explosions, sparking additional emissions from gas heated to millions of degrees.

Two previously undetected molecules, formylium (HCO +) and sulphur monoxide (SO), were found in the cooling aftermath of Supernova 1987A, located 163,000 light years away in a nearby neighbour of our own Milky Way galaxy.

Earlier this year, astronomers in London detected a spectacular, once - in - a-century supernova (dubbed SN2014J) in a relatively nearby galaxy known as Messier 82 (M82), or the Cigar Galaxy, 12 million light - years away.

But the supernovae that go off a few million years later could be hazardous to life in solar systems unfortunate enough to be nearby, Lockman says.

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.

At his proposed distance, the 1181 explosion was roughly a fifth as luminous as the 1987 supernova in the Large Magellanic Cloud, a nearby galaxy, that also emitted less light than the norm.

A newfound star in a nearby galaxy appears to have cheated death by blowing up at least twice as a supernova.

By measuring about 2,400 Cepheid stars in 19 nearby galaxies and comparing the apparent brightness of both types of stars, they accurately determined the true brightness of the Type Ia supernovae.

«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.

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.

Type Ia supernovae are fairly rare in the nearby Universe and represent the explosion of at least one white dwarf star in a binary system.

They made their best measurement to date in a recent study of a supernova first seen 27 years ago in a nearby galaxy.

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 starIn 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 starin addition to the intense and deadly radiation produced by nearby supernovae and other massive young stars.

(iii) Far - infrared spectroscopy of dust and ice features will address uncertainties in the mass and composition of dust in galaxies, and the contributions of supernovae to the interstellar dust budget will be quantified by photometry and monitoring of supernova remnants in nearby galaxies.

For example, Helfand pointed out that there are cases in which astronomers concluded that a pulsar and supernova remnant, while nearby, are not related because the pulsar's «characteristic age» was much younger than the age calculated for the supernova remnant.

On that «super» day, the All Sky Automated Survey for SuperNovae (ASASSN) reported a supernova in the same nearby galaxy Kepler was monitoring.

By comparing the observed brightness of both types of stars in those nearby galaxies, the astronomers could then accurately measure their true brightness and therefore calculate distances to roughly 300 Type Ia supernovae in far - flung galaxies.

The youngest stars in the galactic region surrounding around the Solar Neighborhood are associated with «subgroup B1» of the Pleiades (M 45) stellar moving group, and astronomers hypothesize that the more massive stars born in this group may have already exploded as 20 or so supernovae over the past 10 to 20 million years as the entire group of stars moved through a nearby region of the Local Bubble (Berghoefer and Breitschwerdt, 2002).

As he puts it: «Today the Royal Astronomical Society in London publishes (online) Henrik Svensmark's latest paper entitled «Evidence of nearby supernovae affecting life on Earth».

GCRs are modulated by both solar magnetic field, which is largely unpredictable in strength except for generalities associated with 11 - year sunspot cycle and is also modulated by unpredictable events like nearby supernovas, and by more predictable very very long slow changes in intensity due to the solar system traversing spiral arms of our galaxy and wandering above and below the galactic plane in cycles lasting tens and hundreds of millions of years.