Astronomy | Astrophysics Answers

Activity 1.6
Choose the correct answer.

1.stars the size of our sun swell to a blue super giant after they run out of fuel.
A. True
B. False
2.after nuclear reactions cease a star the size of the sun collapses in on itself to form a white dwarf star.
A. True
B. False
3.what happens in the first stage of a star much bigger than the sun's death?
A. It swells to a Red Super Giant.
B. It swells to a Blue Super Giant.
C. It goes supernova.
D. It forms a white dwarf star.
4.what happens when a star bigger then the sun's core collapses?
A. It forms a white dwarf star
B. It forms a neutron star
C. It goes supernova
D. It expands to a Red Super Giant

Activity 1.6
Choose the correct answer.

1.what is the first stage of a stars life.
A. Nebula collapsing under itself.
B. Supernova of old star.
C. Planets collapsing
D. Fusion of atoms
2.a protostar is what is formed when a nebula's gas and dust come closer together.
A. True
B. False
3.after the protostar gets hot enough nuclear fusion reactions fuse together helium and hydrogen.
A. True
B. False
4.a main sequence star is?
A. A star that shines steadily due to nuclear fusion.
B. Several stars close together.
C.a star with planets orbiting.
D. A nebula that skips a protostar and is instantly turns into a star.
5.the bigger the star the longer it will live.
A. True
B. False
6.what happens when a star the size of our sun runs out of hydrogen?
A. It uses helium as fuel
B. It uses carbon as fuel
C. It goes supernova instantly
D. It turns green

Activity 1.1

1.which planet was the first planet located through mathematical predictions rather than through regular observations of the sky?
2.which planet has the fastest winds, blowing at speeds of over 2,400km (1500 miles) per hour?
3.what is the smallest planet?
4.how many years does it take pluto to orbit around the sun?
5.which is the coldest planet of the solar system?

Activity 1.1
1.what is the comet belt outside of Pluto's orbit called?
2.where is the main asteroid belt in the solar system?
3.what asteroid was the focus of the near spacecraft?
4.where do most comets arrive from?
5.how long could a long period comet take to orbit around the sun?
6.which is shorter, Mercury's day or year?
7.whuch planet has the hottest temperature?
8.how long is Mercury's day?
9.whuch moon is a moon of Mars?
10.which planet is Olympus mons, the highest volcano in the solar system on?
11.what is the largest planet in the solar system?
12.how large is Jupiter's mass when compared to the other planets in the solar system?
13.what is the great Red Spot and Jupiter?
14.how many moons dies jupiter have?
15.which planet has the most moons?
16.which planet was the first planet located through mathematical predictions rather than through regular observations of the sky?

Activity 1.1
1.how many planets are there in the solar system?
2.what planet is closest to the sun?
3.what is the second planet from the sun?
4.what is the third planet from the sun?
5.what is the fourth planet from the sun?
6.what is the fifth planet from the sun?
7.what is the seventh planet from the sun?
8.what is the sixth planet from the sun?
9.what is the eight planet from the sun?
10.what is the farthest planet from the sun?
11.which planet is not a terrestrial planet?
12.which planet is not a gas?
13.what is the most volcanic ally active body in the solar system?
14.which planet has the largest ring system?
15.how much meteoric material do scientists estamate falls on the earth?
16.whuch is the densest planet?
17.what is the largest terrestrial planet?
18.whatvis the only known moon of pluto?
19.what is the earth's radius?
20.what is the rotational period of earth?

2.1.talk to at least three people who speak different languages and find out the following.
2.1.1.what is the equivalent word for universe in their mother tongue? Write the words and specify the language.
2.1.2. Find out what did they learn from their parents /grandparents about the stars and other heavenly bodies.
2.2. What is the theory of relativity?
2.3. What are the two theories of relativity?
2.4. What is the difference between the two theories of relativity?

3.1. Discuss three important discoveries in astronomy by different people.

How much imbalance of protons to electrons numbers have to be done to the bulk Earth and Moon in order to make the electrostatic interaction dominate the gravity by a bare minimum magnitude?

Imagine that you live in a geometrically flat universe which is dominated by radiation. Hubble's constant in this universe is measured to be 70km s−1 Mpc−1 . A Mpc (Mega-parsec) is a million parsecs, and a parsec is 3.086×1016m .

How old is this universe (in billions of years)?

One laser emits a monochrome light fir which the wavelength is 700nm ,another lasers wavelength is 350nm. What is the coefficient of photon impulses