Astronomy Quizs

Unusual characteristics of the Sun compared to most other stars

• It is the only star in the galaxy.

• It is the largest star in the universe.

• It has no planets orbiting it.

• It is the hottest star known.

What type of galaxy is this?

• Elliptical

• Spiral

• Irregular

• Lenticular

Closest star system to the Sun

• The Alpha Centauri system

• Proxima Centauri

• Sirius

• Barnard's Star

How many major spiral arms does our galaxy have?

• 2

• 4

• 6

• 8

Star pointed to by the two front stars of the Big Dipper

• Sirius

• Betelgeuse

• Polaris

• Rigel

Definition of a galaxy

• A collection of stars, gas, dust, and dark matter bound together by gravity.

• A large group of planets orbiting a single star.

• A massive cloud of gas and dust that forms new stars.

• A region of space with no matter or energy.

In which spiral arm of the galaxy does our Sun lie?

• Orion arm

• Perseus arm

• Scutum-Centaurus arm

• Cygnus arm

Cause of a star becoming a main sequence star

• The balance of pressure from fusion and gravity.

• The accumulation of dark matter in the star's core.

• The star's distance from the Earth.

• The presence of a supernova nearby.

Which of the following is NOT one of the three main types of galaxies?

• Spiral

• Elliptical

• Irregular

• Rectangular

What is the term for a galaxy with no distinct shape?

• Elliptical galaxy

• Spiral galaxy

• Irregular galaxy

• Lenticular galaxy