What is the mass of the Earth in kg?

• 6.371 × 10^6 kg

• 5.972 × 10^23 kg

• 7.83 × 10^24 kg

• 5.972 × 10^24 kg

How are stars formed?

• Stars are generated from the heat of comets passing by

• Stars are formed from collapsing clouds of gas and dust in space, which eventually ignite nuclear fusion to become a star.

• Stars are created by aliens as a source of light

• Stars are formed from volcanic eruptions on planets

What is the Schwarzschild radius of a black hole?

• Rs = 2GM/c^2

• Rs = 4GM/c^2

• Rs = GM/c^2

• Rs = 3GM/c^2

What are the three main types of galaxies?

• Circular, Rectangular, Triangular

• Spiral, Elliptical, Irregular

Which space mission was the first to land humans on the Moon?

• Apollo 11

• Mercury 3

• Gemini 7

• Apollo 13

What is the composition of Saturn's rings?

• Ice particles, rocky debris, and dust

• Diamonds, gemstones, and precious metals

• Metallic elements, gas, and liquid hydrogen

• Plastic, rubber, and glass

What is the mass of Jupiter in kg?

• 2.345e+26

• 1.898e+27

• 3.456e+27

• 4.567e+28

What is a neutron star?

• A neutron star is made up of protons and electrons

• A neutron star is a type of galaxy

• A neutron star is a type of black hole

• A neutron star is the collapsed core of a massive star composed almost entirely of neutrons.

What is the event horizon of a black hole?

• The event horizon of a black hole is the point where matter is destroyed.

• The event horizon of a black hole is the point where light can escape its gravitational pull.

• The event horizon of a black hole is the point beyond which nothing can escape its gravitational pull.

• The event horizon of a black hole is the point where time stops.

What are the two main components of the Milky Way galaxy?

• ring and core

• spiral arms and center

• disk and bulge

• halo and nucleus