解析 D。“distance”表示距离,“long”表示“长的”,距离通常用“长”或“短”来描述,这里说地球和银河系的距离,应该是非常长的,“short”是“短的”,不符合实际。“far”表示“远”,“near”表示“近”,一般不直接修饰“distance”。反馈 收藏
They used this map to calculate the center of the Galaxy, the point around which everything revolves.The map indicates that the center of the Galaxy, and the supermassive black hole which dwells there, is situated 25,800 light-years from Earth. This distance is nearer compared to the ...
The radius of Earth is approximately 6,371 kilometers (or about 3,959 miles). This value represents the distance from the center of the Earth to the outer boundary, which is the Earth’s surface. It is important to note that the Earth is not a perfect sphere but is an oblate spheroid...
that resides at the center of the Milky Way,at a safe distance of 25,000 light-years. 围绕着一个处在银河系中心的超大质量黑洞旋转。 But that could change. 但这种情况可能会改变。 If our galaxy collides with another, 如果我们的星系与另一个星系相撞, the Earth could be thrown towards the ga...
To get higher-resolution images, astronomers have two options: increase the distance between radio dishes or observe at a higher frequency. Since the EHT was already the size of our planet, increasing the resolution of ground-based observations required expanding its frequency range, and that’s ...
An object takes 45 years to orbit the Sun. What is its average distance (in AU) from the Sun? About how far is the Earth from the moon? What is the distance from the Earth to Uranus? How far is the moon from Earth? What is the approximate diameter of the Sun?
In summary, the conversation discusses the estimated number and distribution of black holes in the Milky Way. While there is no exact answer, it is believed that there are about 100 million black holes in our galaxy. Based on this estimate, the average distance between an arbitrary point and...
Of the planets, only Mercury and Venus are nearer to the sun; the mean distance from the earth to the sun is c.93 million mi (150 million km). Rotation and Revolution The earth rotates from west to east about a line (its axis) that is perpendicular to the plane of the equator and...
A key item of interest for planetary scientists and astronomers is the habitable zone, or the distance from a host star where a terrestrial planet can maintain necessary temperatures in order to retain liquid water on its surface. However, when observing a system's habitable zone, it is possibl...
Distance from sun: 149.6 million km; equatorial diameter: 12 756 km; mass: 5.976 × 1024 kg; sidereal period of axial rotation: 23 hours 56 minutes 4 seconds; sidereal period of revolution about sun: 365.256 days 2. the loose soft material that makes up a large part of the surface of...