Constellations
What is a star? A STAR is a large sphere of glowing gases. Stars change over time. Which is the closest star to Earth? THE SUN! The sun is a medium sized star MUCH, MUCH larger than Earth
Stars as Tools for Navigation The North Star is called Polaris and located directly above the North Pole. This star appears in the same place every night all year long. In the Northern Hemisphere, if you find Polaris you will be able to tell which direction is north. The Southern Hemisphere does not have a star to help you find its pole. In stead it has what is known as a Southern Cross. The Southern Cross consists of 4 bright stars and some dimmer ones. All of these together point to the south pole.
Stars as tools for navigation North Star Southern Cross
Patterns of Stars People of ancient time saw the constellations as character or animals in the sky. They made up stories to explain how the object, animal, or character came into the night sky. A pattern or group of stars in the sky is called a constellation.
Star Patterns
The Big Dipper
Constellations Earth rotates on its axis, this makes most constellations appear to rise in the east and set in the west during the night. Most constellations appear in many different positions in the sky as the Earth revolves around the sun. There is a group of stars that appear in the sky all night long and all year long. It seems that these stars do not rise and set, but circle the Earth’s north pole each night. These stars are called circumpolar.
STAR CHARTS How can we identify constellations in the night sky? The use of a star chart can help us! A STAR CHART is a map of the stars in the night sky.
STAR CHARTS On a star chart, lines often connect the stars that might make up a constellation. Different star charts must be used at different times of the year and in different places on Earth. Many stars visible from the Southern hemisphere cannot be seen from the Northern hemisphere.
STAR CHARTS
What other tools can help us identify constellations? STAR CHARTS are the BEST for identifying a constellation in the sky. A COMPASS is the BEST for locating DIRECTION (North, South, East, and West) You need to know direction before you can use a star chart correctly.
What other invention helps us view items in space? A telescope!
Brainpops Constellations Telescopes
NOTES: Star- large sphere of glowing gases Constellations- a pattern or group of stars in the sky Star Chart- map of the stars in the night sky used as a way to identify constellations Compass- used to locate direction in order to use a star chart correctly Telescope- used to see far away objects in space up-close
NOTES: Star- large __________ of glowing _________ Constellations- a _________ or group of ______ in the sky Star Chart- _______ of the ______ in the night sky used as a way to identify constellations Compass- used to locate _________ in order to use a star chart _________ Telescope- used to see ______ away ________ in ________ up-close