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。
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Our sun and the star Sirius are both main-sequence stars. The main-sequence stars stay in the main sequence for approximately 10 billion years. Red dwarf stars: Red dwarf stars are smaller and cooler than main-sequence stars. They are the most numerous type of star in our galaxy, but ...
Originating from Sirius, one of the most important stars to play a role in spiritual awakening, Sirian starseeds are peacekeepers and guardians: bold, strong-willed, and passionate beings with a strong sense of responsibility and leadership. They often exhibit a focus on technology, innovation, an...
Ciri is the star of The Witcher 4 (Image credit: CD Projekt Red) After much nail-biting and speculation we now know that Ciri is definitely our protagonist for The Witcher 4. We'll be taking a trip into the future with Ciri as an establish witcher the way Geralt was in his own trilo...
Sirius, the Nile Star The Egyptian goddess, Sopdet. (Image credit: Wikimedia Commons/ Jean-Pierre Dalbera) Sirius was very important to the ancient Egyptians. Each year in mid-August, it would be the first bright star to rise in the predawn sky, known as a heliacal rising. The timing...
As December begins, the bright reddish planet Mars will be shining just above (or celestial north of) the large open star cluster in Cancer known as the Beehive, Praesepe, and Messier 44. (Image credit: Chris Vaughan/Starry Night) As December begins, the bright reddish planet Mars will be...
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....
stars. Our Sun is a main sequence star, and so are our nearest neighbors, Sirius and Alpha Centauri A. Main sequence stars can vary in size, mass and brightness, but they’re all doing the same thing: converting hydrogen into helium in their cores, releasing a tremendous amount of energy...
What is a power analyzer? What is electrical power? Quantifying electrical power How do we calculate electrical power? Understanding power measurement Power vs. energy - what’s the difference? Why do we measure power? What do power analyzers do? Dewesoft power analyzers The SIRIUS XHS - the...