Stars, the Universe, and Galaxies

Define the "universe."

• All life form and objects in our solar system.

• All matter and energy in existence

• All of the stars and planets we can see.

• I don't know.

Tags

NGSS.HS-ESS1-2

Scientist use Light years to measure objects in space rather than units such as Miles or Kilometers because of how massive the Galaxy and Universe is.

• True

• False

Tags

NGSS.MS-ESS1-3

A light year is...

• The speed light travels
• How long it takes light to get to you from the sun
• The distance light can travel in a year
• How many years it takes light to be emitted

Light Years are a measure of:

• time
• speed
• distance
• light

Why is it considered inappropriate to use light years to measure distances within our solar system?

• The light year is too big

• The solar system is to small

• light doesn't travel in our solar system

• We only use light years to measure sizes, not distances

The Milky Way is about ___________ light years in diameter.

• three

• four

• 9.5 trillion

• 100,000

• 300,000

The number of minutes it takes light to travel from the Sun to Earth

• 300,000

• eight

• Light year

• astronomical unit

BONUS QUESTION: what is buzz lightyear's team name

• Command Star
• Spacy
• Lightyears
• Star Command

A diagonal area on an H-R diagram that includes more than 90 percent of all stars.

• main sequence

• apparent brightness

• absolute brightness

• Hertzsprung-Russell diagram

A graph relating the surface temperatures and absolute brightness of stars

• spectrograph

• main sequence

• Hertzsprung-Russell diagram

• parallax