Respuesta :
1 - telescope
A telescope is a magnifying tool used ini astronomy due to its high magnification power.
2 - astronomers
Astronomers are people that study space, stars, contellations, planets and the interactions between them.
3 - radio waves
A kind of electromagentic radiation that is characterized by beng longer than infrared waves.
Hope it helped,
BioTeacher101
Answer:
Scientist Galileo Galilei used the _Telescope___ to observe the stars and planets. This same tool has allowed modern__Astronomers__ to see objects that are billions of light years from Earth. This tool also detects things such as __Radio waves__ and x-rays, which are invisible to the human eye.
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