Measuring this drop is the transit (凌日) method of discovery. NASA’S Kepler space telescope has discovered many exoplanets this way.”(例如,当一颗系外行星在它的恒星和我们之间移动时,会导致恒星的亮度稍微下降。测量这种下降就是凌日发现法。美国航天总局的开普勒太空望远镜就是通过这种方法发现了很多系外...
Even so, scientists have confirmed more than 3, 500 exoplanets. E. Astronomers have received signals indicating the presence of a planet. F. Direct observation of the exoplanets is becoming increasingly possible. G. The existence of extrasolar planets, or exoplanets, has long been discussed. ...
Rogue planets have historically been difficult to detect. Astronomers discovered planets outside Earth's solar system in the 1990s. Those planets, called exoplanets, range from extremely hot balls of gas to rocky, dusty worlds. Many of them circle their own stars, the way Earth circles the sun...
While some of these exoplanets could potentially be orbiting a star from very far away, the majority of them most likely have no parent star at all, scientists say.And these strange worlds aren't mere statistical anomalies. They likely outnumber "normal" alien planets with obvious parent stars...
【3】In case of fire in Pacific, guests should ___. A. dial 7 and wait for the hotel security’s instructions B. take their keys and leave Pacific by way of lifts C. leave Pacific through the fire exits D. be together with the Fire Brigade 【4】What does the underlines word “eva...
This is the distance from a star where surface temperatures of a planet wouldn’t be too hot or too cold for liquid water. So far, only a small slice of our galaxy, the Milky Way, has been explored. Even so, scientists have confirmed over 3,500 exoplanets, with more being added ...
By measuring this drop, NASA’S Kepler space telescope has discovered many exoplanets.(当一颗系外行星在它的恒星和我们之间移动时,它会导致恒星亮度的小幅度下降。通过测量这种下降,美国宇航局的开普勒太空望远镜发现了许多系外行星)”可知,上文提到了一种发现行星的方法,后文则说美国宇航局通过这种办法发现了...