Astrophysics Quiz

A galaxy contains a disk of stars, nebulae, the interstellar medium, and spiral arms.

• Irregular

• Spiral

• elliptical

• Lenticular

The __________ period during which a planet completes one revolution in its orbit around its star.

• Revolution period

• Light year

• Astronomical U

• Light-distance

5 Astronomical units (AU) = __________ km

• 7.5×108

• 1.5×108

• 1.5×1011

• 7.5×109

The planet in the solar system that has the longest day.

• Venus

• Earth

• Jupiter

• Neptune

The total energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of temperature.

• Stefan-Boltzmann

• Wien's law

• Kepler laws

• Newton law

Planet is located in the Kuiper Belt.

• Ceres

• Pluto

• Makemake

• b and c

According to MK-System, the coolest stars take the letter __________

• O

• A

• F

• M

White dwarfs are located on __________ of the H-R diagram.

• Top left

• Top right

• Bottom left

• Bottom right

It consists of two up quarks and one down quark.

• Nucleus

• Atom

• Proton

• Neutron

The layer of atmosphere in which the International Space Station orbits around the Earth.

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere