1.
A person trained to travel and work in space.
2.
The path an object takes around a planet, star, or moon.
3.
A condition in space where there is very little gravity.
4.
system The body’s defense system against illness.
5.
A medicine that helps the body fight certain diseases.
6.
immunity Protection that happens when most people in a group are vaccinated.
7.
energy Energy that comes from natural sources that will not run out.
8.
panel A device that changes sunlight into electricity.
9.
A material used in electronics and solar panels.
10.
Light made by living things, such as some deep-sea fish.
11.
The force of something pushing against a surface.
12.
deposit A natural collection of valuable substances in the ground.
13.
An old system of sending messages using electrical signals.
14.
A message sent from one place to another.
15.
dial A round dial on older telephones for making calls.
16.
A device that makes far-away objects look closer.
17.
A planet outside our solar system.
18.
A large group of stars, gas, and dust in space.
19.
The layer of gases around a planet.
20.
Bang The event scientists believe started the universe.
21.
A separate section of a spacecraft or space station.
22.
Extra doses of a vaccine to keep protection strong.
23.
fuels Energy sources like coal, oil, and gas.
24.
A new tool, device, or method that is created.
25.
The act of watching something carefully to learn from it.
