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The word Sirius is derived from the Greek word for "glowing" or "scorching" and the star is twice as big as the sun. Sirius will appear brighter in the next 60,000 years, as it is gradually moving closer to the solar system and Earth....
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The brightest star in the Lyra constellation is located 25 light years away. So it is not surprising that the news arrives there with such a delay. In general, Vega is a white star of the main sequence, quite similar to Sirius. Though, it does not have a small white dwarf companion. ...
Sirius C. Proxima Centauri D. Betelgeuse 相关知识点: 试题来源: 解析 C。本题考查对离地球最近的恒星的了解。The nearest star to the earth(离地球最近的恒星)is Proxima Centauri(比邻星)。Alpha Centauri(半人马座阿尔法星)、Sirius(天狼星)和 Betelgeuse(参宿四)都不是离地球最近的恒星。
In December, while Vega is slowly making its exit, Sirius joins it, and both are in the sky at the same time. The trouble is, both of them are close to the horizon and can be difficult to see. So, where does that leave us? It’s true that the brightest star in December is Vega...
Sirius, the brightest star in Canis Major and in the entire night sky, too, is hard to miss once it clears the trees and rooftops in the southeast by 7:30 p.m. local time. Also known as the Dog Star, it will climb to its highest point in the lower part of the southern sky shor...
How does a star produce heat and light? The reason a star glows is that it uses nuclear fusion to fuse hydrogen atoms into helium nuclei producing both heat and light. Scientists can determine what elements make up a star by looking at the emissions spectra of the light they produce. This...
For the ancient Egyptians, Sirius’s dawn rising (known to them as Sothis) also coincided with the Nile River’s flood season. They used the star as a “watchdog” for that event. Of course, the appearance of Sirius does not actually affect seasonal weather here on Earth, but its appear...
and the audience itself is different. “Being really great at podcasting does not solve all the issues with respect to [Spotify’s] position in the music business,” the executive says. “It’s an interesting opportunity; I understand why they’re going...