Stars in the Universe
Module AChapter 1Grade 6
Scientists measure the distance to stars in…
• light-years
Light travels from the sun to Earth in about…
• 8 minutes
The hottest stars are…
• blue
The sun is a…
• mid-life star• & is the closest
star to Earth
Stars are found in groups called…
• galaxies
Elliptical Galaxy
• Shaped like sphere that is stretched out at ends
Spiral Galaxy
• Sweeping arms extending from a densely packed center
• The Milky Way is a spiral galaxy
Irregular Galaxy
• Contains many young stars
• Generally the smallest of the 3 galaxies
Earth is a planet in our solar system. The solar system is on one of arms of a spiral galaxy called the Milky Way. The Milky Way is
in a group of galaxies called the Local Group. This group is part of the universe.
Earth
Solar System
Local Group
Universe
Stars begin to form when…
• hydrogen & dust are pulled into a ball by gravity
• The energy inside a star that results in visible light is produced by..
• nuclear fusion
• Two atoms fuse together by the process of…
• nuclear fusion
Just before it dies, a massive star turns into a…
• supernova
Clouds of gas & swirling dust in spaces between
stars are…
• nebulas
Concept Mapgravity/pressure
collapse
explosion
nebula
nuclear fusion
red giant
supernova
This page was copied from Nick Strobel's Astronomy Notes. Go to his site at www.astronomynotes.com for the updated and corrected version.
Top Related