Because Earth rotates on its axis from west to east, the stars and planets in the sky appear ​ ​ (a)   during the course of the night.

• to move
• brighter

The North Star, named ​ (a)   , is almost directly above the North Pole.

• Polaris
• Sirius

Astronomers divide the sky into 88 ​ (a)   , also called constellations.

• regions
• solar systems
• galaxies

A star emits a range of ​ (a)   called its spectrum.

• wavelengths
• magnitudes
• colors

Tags

NGSS.MS-PS4-1

Telescopes can detect visible light and other types of ​ (a)   .

• wavelengths
• radiations
• magnitudes
• sounds

A spectroscope spreads light into different ​ (a)   .

• wavelengths
• elements
• magnitudes

Tags

NGSS.MS-PS4-2

Astronomers can analyze the elements that make up a star by passing its light through a ​ (a)  

• spectroscope
• telescope
• microscope

Tags

NGSS.MS-PS4-2

Different types of ​ (a)   emit electromagnetic radiation with different wavelengths.

• stars
• planets
• moons
• universes

Tags

NGSS.MS-PS4-2

A stationary object might appear to change ​ (a)   when it is viewed from two different points.

• position
• luminosity
• shape
• size

Tags

NGSS.HS-PS4-3

​ (a)   is the apparent change in an object's position caused by looking at it from two different points.

• Parallax
• Luminosity
• Wavelength
• Spectrum
• Magnitude