pg 1159 stars造句

例句与造句

1. Some PG 1159 stars have varying luminosities.
2. RX J0122.9-7521 has been identified as a galactic PG 1159 star.
3. PG 1159 stars reach luminosities of ~ 10 38 erg / s but form a rather distinct class.
4. "' PG 1159-035 "'is the prototypical PG 1159 star after which the class of PG 1159 stars was named.
5. "' PG 1159-035 "'is the prototypical PG 1159 star after which the class of PG 1159 stars was named.
6. It's difficult to find pg 1159 stars in a sentence. 用pg 1159 stars造句挺难的
7. PG 1159 stars are a group of very hot, often pulsating WDs for which the prototype is PG 1159 dominated by carbon and oxygen in their atmospheres.
8. It is thought that the atmospheric composition of PG 1159 stars is odd because, after they have left the asymptotic giant branch, they have reignited helium fusion.
9. As a result, a PG 1159 star's atmosphere is a mixture of material which was between the hydrogen-and helium-burning shells of its AGB star progenitor ., ?.
10. The pulsators are known as GW Virginis stars ( DO variables, sometimes also known as PG 1159 stars ), V777 Herculis stars ( DB variables ) and ZZ Ceti stars ( DA variables ).
11. A "'pulsating white dwarf "'is a white dwarf star whose luminosity PG 1159 . ( Some authors also include non-PG 1159 stars in the class of GW Vir stars . ) GW Vir stars may be subdivided into "'DOV "'and "'PNNV "'stars; they are not, strictly speaking, white dwarfs but " pre-white dwarfs " which have not yet reached the white dwarf region on the Hertzsprung-Russell diagram . and in May 2012, the first extremely low mass variable ( "'ELMV "') white dwarf was reported.