light echoes造句

例句与造句

1. Using light echoes, it is sometimes possible to see the faint reflections of historical supernovae.
2. Light echoes were used to determine the distance to the Cepheid variable RS Puppis to within 1 % of its true value.
3. Light echoes have also been observed in connection with supernovae SN 1993J and SN 1987A, the closest supernova in modern times.
4. Light echoes can be identified by comparing photos of gas and dust clouds taken months or years apart and spotting changes in the light rippling across the clouds.
5. Light echoes have been used to study the supernova that produced the supernova remnant Cassiopeia A . and looking at the light echoes of Cassiopeia A allowed for the first detection of supernova asymmetry in 2010.
6. It's difficult to find light echoes in a sentence. 用light echoes造句挺难的
7. Light echoes have been used to study the supernova that produced the supernova remnant Cassiopeia A . and looking at the light echoes of Cassiopeia A allowed for the first detection of supernova asymmetry in 2010.
8. Direct spectral observations did not begin until after the Great Eruption, but light echoes from the eruption reflected from other parts of the Carina Nebula were detected using the circumstellar material in a similar way to a type IIn supernova.