Astronomers can use their eyes to study the stars. They can also use various telescopes that either refract, reflect, and detect exotic formations.
the astronomers use Absolute magnitude
Astronomers use infrared light to map the dust in between stars.
They use the bathroom like anyone else in a house or building. They use the restroom, they are astronomers, not astronauts.
telescope
Yes
Astronomers use an auditory up on a hillside, and away from cities and pollution. So what i'm trying to say is that astronomers use an auditory to study the components of the universe.
Astronomers use a telescope to view planets directly.
Astronomers use luminosity to measure the total amount of energy a star emits in all directions. By knowing a star's luminosity, astronomers can calculate its distance, size, and temperature. Luminosity helps astronomers understand the life cycle of stars and their evolution.
a stethoscope
The telescope wasn't invented until about 1604, so "early" astronomers had no telescopes.
Astronomers, mostly those who work for NASA. Some astronomers from Universities can also access it.
they use tools.