Space elevator – level 3
Ideas of a space elevator have been around since the 19th century; however, we still continue to rely on tried and tested methods of getting into space.
Rockets use a lot of fuel to get into space, and they have to carry fuel to lift the fuel, therefore, getting to the Moon or Mars costs millions of dollars. With a space elevator, the cost could be reduced to dollars per kilogram.
The basic idea of a space elevator is a cable that’s pulled thanks to a counterweight. The elevator stays vertical because the counterweight is thrown outward by the Earth’s rotation and the base is held down by gravity. Early ideas suggested building a cable from Earth up into space; however, the materials needed to withstand such enormous weight don’t exist. Physicists have come up with a solution, carbon nanotubes, a supermaterial stronger than other materials. But there are estimated millions of objects orbiting the Earth, and they could cause significant damage to the elevator.
Difficult words: counterweight (a weight that’s as heavy as something else, so that the two objects can balance), withstand (to resist), nanotube (a material that has a tube-like structure and it’s composed of a large number of carbon atoms).
You can watch the video news lower on this page.
Is it possible to build a space elevator using carbon nanotubes?
LEARN 3000 WORDS with NEWS IN LEVELS
News in Levels is designed to teach you 3000 words in English. Please follow the instructions
How to improve your English with News in Levels:
- Do the test at Test Languages.
- Go to your level. Go to Level 1 if you know 1-1000 words. Go to Level 2 if you know 1000-2000 words. Go to Level 3 if you know 2000-3000 words.
- Read two news articles every day.
- Read the news articles from the day before and check if you remember all new words.
- Listen to the news from today and read the text at the same time.
- Listen to the news from today without reading the text.
- Answer the question under today’s news and write the answer in the comments.