meters B. kilometers C. miles D. light years3. Which is the seventh brightest star in the sky?A. The sun. B. Rigel. C. Proxima Centauri. D. The Pistol Star4. If a star i.s nearing the end of its life, its color is ___. A. blue B. red C. yellow D. red and blue ...
The newly discovered black holes are within about 31 trillion(万亿;兆)kilometers from the supermassive black hole at the center of the Milky Way. So there is still a lot of empty space and gas among all those black holes.Chuck Hailey is an astronomer at Columbia University in New York. ...
Because the space is so great,it is difficult to work out how far away a star is.Instead of kilometers,we have light-years.A light-year means the distance light travels in one year.Our nearest neghbour galaxy is more than 900.000 light-years aways from the earth.Question:1.Where and ...
If the sun was hollow, how many spheres the size of Mars could fit inside? How many minor planets are there in the Solar System? How wide is the Oort cloud in kilometers? How many dwarf planets are in the Milky Way? What is the diameter of the Oort cloud?
(9.5 trillion kilometers). Just for reference, Earth is about eight light minutes from the Sun. A trip at light speed to the very edge of our solar system – the farthest reaches of the Oort Cloud, a collection of dormant comets way, way out there – would take about 1.87 years. ...
Is the speed of light constant? The speed of light is a universal constant in a vacuum, like the vacuum of space. However, light *can* slow down slightly when it passes through an absorbing medium, like water (225,000 kilometers per second = 140,000 miles per second) or glass (200,...
D. It has 100 billion galaxies. E. It is unimaginably big. F. It has as many galaxies as the Milky Way. 相关知识点: 试题来源: 解析 C 文章第一句就提出宇宙大的人类根本无法想象,原句为It is just about impossible to imagine how big the universe is,故选C。反馈 收藏 ...
As the name suggests, this "synthesizes" a giant-aperture telescope equivalent to the widest baseline between the two most distant antennae in the ALMA interferometer, which can be up to 10 miles (16 kilometers) apart. This maximum baseline between opposite ends of the array can be shortened...
How far is the moon from Earth? How far away from Earth is the nearest Earth-like exoplanet? How far are the gas planets from the Sun? What is Halley's Comet farthest distance from the sun? What is the distance from Uranus to Neptune in kilometers?
Sunshine attractive scenery many! Wan Pingkou, bamboo dwelling place of Buddhist immortals, but also has the Milky Way park, the forest park ...Our sunshine total area 5310 square kilometers, population 2,720,000, if you to our city traveling, I must give you to introduce three famous ...