telescopes and galaxies

Question 1

What is the purpose of a telescope?

Answer 1

Telescopes are used to see things that we cannot see with the unaided eye.

Question 2

How do telescopes work?

Answer 2

Telescopes collect electromagnetic radiation and concentrate it to form a brighter image.

Question 3

What do different types of telescopes collect?

Answer 3

Different types of telescopes collect different types of electromagnetic radiation.

Question 4

Where are telescopes placed?

Answer 4

Telescopes are placed in locations depending on what type of electromagnetic radiation they are collecting.

Question 5

What is a galaxy?

Answer 5

A galaxy is a massive system of stars, stellar remnants, interstellar gas, dust, and dark matter.

Question 6

What are the different shapes of galaxies?

Answer 6

Galaxies can take various shapes, including spiral, elliptical, and irregular.

Question 7

What are galaxy clusters?

Answer 7

Galaxy clusters are large groups of galaxies held together by gravity.

Question 8

What are superclusters?

Answer 8

Superclusters are massive groups of galaxy clusters and are among the largest known structures in the universe.

Question 9

What is the electromagnetic spectrum?

Answer 9

The electromagnetic spectrum is the range of all types of electromagnetic radiation.

Question 10

What are the wavelengths of incoming radiation from the Sun?

Answer 10

Wavelengths of incoming radiation from the Sun range from 0.01 nm to 1000 m.

Question 11

What are the wavelengths of outgoing radiation from Earth?

Answer 11

Wavelengths of outgoing radiation from Earth range from 0.1 nm to 1000 um.

Question 12

What is the name of the person mentioned?

Answer 12

Camila Bouchee ma

Question 13

What types of electromagnetic radiation do not make it through the Earth’s atmosphere?

Answer 13

Not all EM radiation makes it through the Earth’s atmosphere.

Question 14

What does an optical telescope collect?

Answer 14

Visible light

Question 15

What does a radio telescope collect?

Answer 15

Radio waves

Question 16

What does an X-ray telescope collect?

Answer 16

X-rays

Question 17

What does an atmospheric Cherenkov telescope collect?

Answer 17

Gamma rays

Question 18

What is a galaxy?

Answer 18

A galaxy is a gravitationally bound system of gas, dust, and dark matter.

Question 19

How many observable galaxies are estimated to exist?

Answer 19

Between 2 trillion

Question 20

What is the name of the galaxy we live in?

Answer 20

The Milky Way

Question 21

How many stars are estimated to be in the Milky Way?

Answer 21

Hundreds of billions

Question 22

What is our sun’s relation to the Milky Way?

Answer 22

Our sun is one of the stars within the Milky Way.

Question 23

Where is every star you see in the sky located?

Answer 23

Within the Milky Way!

Question 24

What are the three types of galaxies?

Answer 24

1. Spiral
2. Elliptical
3. Irregular

Question 25

How are galaxies classified?

Answer 25

Galaxies are classified by shape.

Question 26

What is at the center of every galaxy?

Answer 26

There is a supermassive black hole at the center of every galaxy.

Question 27

Describe spiral galaxies.

Answer 27

Spiral galaxies are flat disks with spiral arms that can be tightly wound or more open, and they have slightly thicker centers.

Question 28

What is the shape of elliptical galaxies?

Answer 28

Elliptical galaxies range from nearly spherical to elongated shapes.

Question 29

Where are stars concentrated in elliptical galaxies?

Answer 29

Stars are concentrated in the center of elliptical galaxies.

Question 30

Do elliptical galaxies have spiral arms?

Answer 30

Elliptical galaxies have no spiral arms.

Question 31

What is the shape and diameter of the Milky Way?

Answer 31

The Milky Way is a spiral galaxy that is 100,000 light years across. ## Footnote 1 light year = 9.5 x 10^12 km

Question 32

What is the nearest galaxy to the Milky Way?

Answer 32

The nearest galaxy to the Milky Way is the Andromeda galaxy, also known as M31, which is also a spiral type.

Question 33

What will happen to the Milky Way and Andromeda in the future?

Answer 33

Scientists predict that our galaxy will collide with Andromeda in 4.5 billion years.

Question 34

What is a galaxy cluster?

Answer 34

A galaxy cluster is a structure that consists of anywhere from hundreds to thousands of galaxies bound together by gravity.

Question 35

What is the largest known gravitationally bound structure in the universe?

Answer 35

Galaxy clusters are the largest known gravitationally bound structures in the universe.

Question 36

What cluster is the Milky Way part of?

Answer 36

The Milky Way is part of a cluster called the Local Group.