Technology & design · News English
One fuel tank, two ways to move
NASA tests a small spacecraft with a different approach to movement.
Your goal: explain the purpose of a design with to + verb. Notice the difference between a test and a proven result.
Making room for science
What problem could a shared fuel tank help solve?
1Engineers at NASA have finished a series of ground tests on a spacecraft about the size of a large shoebox. In a report published on 25 September, the agency described a design that could make better use of the limited space inside small satellites.
2Spacecraft often need different ways to move. One engine can produce a strong push for quick changes. Another can provide a smaller push for slower, efficient movements. Separate systems usually need extra tanks and pipes, which add weight and take up room.
3The new spacecraft uses one fuel tank to supply two types of engine. NASA says this arrangement could leave more space for scientific instruments. The fuel is called ASCENT. The mission is designed to test whether the combined system works in space.
4Before that can happen, engineers must check the hardware carefully. They tested for leaks, exposed it to changing temperatures in a vacuum chamber, and checked its balance with a spin test.
5The ground tests are complete, but they do not prove that the whole mission will succeed. The next steps include final checks and fitting solar panels. A successful demonstration could help future spacecraft carry more useful equipment.
Original teaching summary. Language examples and model answers are illustrative, not news quotations.
Word help · Three useful words
Read the meanings and examples. Choose one word to use in your own sentence.
efficient
working well without wasting energy, time or materials
An efficient machine uses less energy.
leak
a small opening that lets liquid or gas escape
We found a leak in the pipe.
demonstration
a test or example that shows how something works
The team gave a demonstration of the new tool.
Check your reading · Three questions
Choose one answer for every question, then check. You can change an answer and check again.
Useful English: explain a purpose
Use to + verb to explain why you do something: I carry a small bag to save space. Compare a reason: I carry it because it is light.
Name something you use and explain its purpose with to.
Model and help
Model: I use a calendar to remember appointments.
Alone: give another example. Tutor: ask Why is that useful?
Speak: improve an everyday object
Choose an everyday object. Suggest one small improvement and explain its purpose. Speak for 45 seconds.
Labelled model answer
I would put a small light inside my bag to find my keys more easily. I would test it in a dark room to see whether it helped. It should be simple and light.
Alone: repeat with one clearer purpose. Tutor: ask How would you test your idea?
Mastery check · Three questions
Choose one answer for every question, then check. You can change an answer and check again.
Sources and reporting date
NASA report: 25 September 2026, 15:36 EDT (UTC-04:00). Photograph: NASA image record dated 25 September 2026; exact capture time not stated.
- NASA: tests of a dual-mode propulsion CubeSat
Original report, 25 September 2026, 15:36 EDT.