type 1a supernova造句
例句與造句
- In 1994, a Type 1a supernova was discovered about two weeks before reaching peak brightness.
- We have to consider that the properties of Type 1A supernovas may vary and that their brightness may not be uniform,
- SNR 0509-67.5 is the remnant of an unusually energetic Type 1a supernova from about 400 years ago.
- But until recently, the galaxies in which Type 1A supernovas have been observed were far too distant to discern Cepheid variables.
- Within this galaxy, a Type 1A supernova was detected in 1990, allowing astronomers to measure its peak brightness as viewed from Earth.
- It's difficult to find type 1a supernova in a sentence. 用type 1a supernova造句挺難的
- For that reason, astronomers hypothesize a type 1a supernova may be the explosion of a white dwarf that has exhausted its hydrogen fuel.
- As Woosley said in an e-mail message, " just how a Type 1a supernova explodes is one of the most complicated things in the big wide world ."
- If Sandage and like-minded astronomers are right, the peak brilliance of any given Type 1A supernova is about the same as the peak brilliance of any other member of this group.
- Because all Type 1a supernovas start from the same point, astronomers have tried to use them as cosmic geodetic markers, standard candles whose distances can be inferred from how bright they appear.
- Because of its relative proximity, some in particular, Edward Sion, astronomer & astrophysicist at Villanova University, and his team therefrom contend that a type 1a supernova could have a significant impact on Earth.
- Riess jointly led the study with Brian Schmidt in 1998 for the High-z Supernova Search Team which first reported evidence that the Universe's expansion rate is now accelerating through monitoring of Type 1a Supernovas.
- So at the distance of the Pistol Star ( 25 000 light-years ), a Type 1a supernova would be 587 503 times dimmer than magnitude-19.6, which is magnitude-5.2.
- Applying this value to measurements made over the years of the apparent peak brightness of six other Type 1A supernovas, Sandage recalculated their distances from Earth, reckoned in their recessional speeds and concluded that the Hubble constant is 57.
- :: : : A type 1a supernova at the Capella system would have an apparent visual magnitude of-18.7, about 250 times brighter than the full Moon . talk ) 23 : 31, 14 October 2011 ( UTC)
- Because the brightness of Cepheid variables is presumed to be known, the Sandage group was able to calculate the distance of the NGC 4639 galaxy as 82 million light-years; from this, they calculated a new value for the absolute peak brightness of a Type 1A supernova.
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