Sentences with phrase «as supernovae after»

Not exact matches

After a star explodes as a supernova, it usually leaves behind either a black hole or what's called a neutron star — the collapsed, high - density core of the former star.

But, as what's now called Tycho's supernova remnant demonstrates, something still fuels the radiation fire hundreds of years after its energy should have been drained.

At first, astronomers suspected that 1987A was a class of supernova known as type 1a — the detonation of a stellar core left behind after a star like the sun quietly sheds gas at the end of its life.

After shining for many millions of years, stars end their lives, mainly, in two ways: very high mass stars die very violently as supernovae, while low mass stars end as planetary nebulae.

After graduation, Cruz rejoined the Instituto Superior Técnico as a research technician, helping set up a supernovae group.

Shortly after their birth, they exploded as supernovas, ejecting newly formed carbon, oxygen, and nitrogen atoms into space.

Thirty years after its explosion was observed on Earth, supernova 1987A is still visible, as seen in this Hubble Space Telescope image from January.

Soon after, pulsars were identified as rapidly spinning neutron stars, the remnants of supernova explosions; they weigh as much as the sun but are just a dozen miles wide.

After exploding as a supernova, the star would have faded from view within a year or so — and eventually from living memory, until, 25 years ago, a radio telescope near Canberra, Australia, found its curious remains.

These are black holes that are a few to a few dozen times the mass of our sun that were likely formed by the death of very massive stars after they'd run out of fuel and exploded as supernovas billions of years ago.

On September 18, 2006, astronomer Robert M. Quimby detected the brightest and largest supernova ever recorded by contemporary astronomers, using the ROTSE - IIIb telescope at McDonald Observatory (Robert M. Quimby, 2006; and Katie Humphrey, Austin - American Statesman, May 9, 2007)-- but became second brightest on October 10, 2007 after twice - as - bright Supernova 2005ap (see APOD; and Quimby et asupernova ever recorded by contemporary astronomers, using the ROTSE - IIIb telescope at McDonald Observatory (Robert M. Quimby, 2006; and Katie Humphrey, Austin - American Statesman, May 9, 2007)-- but became second brightest on October 10, 2007 after twice - as - bright Supernova 2005ap (see APOD; and Quimby et aSupernova 2005ap (see APOD; and Quimby et al, 2007).