Sentences with phrase «by nearby supernovae»
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.
http://members.nova.org/
«The formation of our own Sun and planets probably was heavily influenced, if not triggered, by a nearby supernova explosion,» Lockman said.
Not exact matches
2) The nebula began a contraction that may have been triggered by the shock wave of a nearby supernova.
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.
Here's a map of six supernovas directly seen by human eyes throughout history, and one nearby explosion that went unnoticed.
Most such explosions are thought to have an identical intrinsic brightness, which Sandage and his colleagues have found by measuring the distances of two nearby galaxies that have spawned type Ia supernovae.
According to a summary of Barstow's talk released by the Royal Astronomical Society, the most probable explanation for the missing gas is that the area was swept clear of material by a nearby star that went supernova within the last few million years.
«Supernova collides with nearby star, taking astrophysicists by surprise.»
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.
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.
(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.
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.
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.