Stars, constellations and Gravity

Stars are made of mostly which two gases?

• Hydrogen and Helium

• Hydrogen and Oxygen

• Hydrogen and Nitrogen

• Hydrogen and Carbon

Stars release energy in the form of heat and light thanks to a process called ___________.

• nuclear fusion

• supernova

• luminosity

• spectroscopy

A light year is a measurement of:

• Time
• Distance
• Gravity
• None of the Above

The absolute magnitude of a star is defined as…

• mass of a star

• color of a star

• brightness of a star, as it appears from Earth

• brightness of a star independent from the distance of Earth

Felix examined several photos of stars. To compare their temperatures, he looked at the colors of the stars. He organized the photos in order from coolest to hottest. Which of these answers shows the correct order?

• red, yellow, white, blue

• white, blue, yellow, red

• yellow, white, blue, red

• blue, yellow, white, red

When the sun starts to die it will first turn into a _____ .

• white dwarf

• red giant

• red supergiant

• black hole

An object whose gravity is so strong that nothing can escape.

• Planetary Nebula
• Supernova
• Neutron Star
• Black Hole

A group of visible stars that form a pattern in the sky are called...

• galaxies

• constellations

• meteors

• shooting stars

The sky is divided into ____ official constellations.

• 11

• 22

• 44

• 88

People in the Northern Hemisphere see the same constellations as the people in the Southern Hemisphere.

• True

• False