Sci Lesson 3 Ch 16 Flashcards
(25 cards)
Who where the 1st to divide the sky into groups of stars?
Ancient people
What is GALAXY
A huge system of stars, dust and gas held together by gravity
In which galaxy are the sun the earth and the other planets in our solar system contained within?
The Milky Way
What type of galaxy is the Milky Way?
A spiral galaxy
Describe a spiral galaxy
Spiral galaxies look like pinwheels with bulging middles, and wispy arms that fan outwards
Describe ELLIPITICAL GALAXIES
They are round or oval like a football
Describe IRREGULAR GALAXIES
They have no real shape and are young galaxies in which new stars are forming
What is a CONSTELLATION
A group of stars that form a pattern.
Are stars close in the same constellation close to each other?
NO. they only appear to be
How many constellations are there?
88
What can a constellation also be called?
A stars ADDRESS
The earth is divided into 2 hemispheres, what are they called?
Northern and Southern hemispheres
What is a other name for the big dipper?
URSA MAJOR
What is another name for the Little Dipper
URSA MINOR
What is a another name for THE NORTH STAR
POLARIS
Which constellations can only be seen in the NORTHERN HEMISPHERE?
The big dipper,
the little dipper and
the north star
the North Star a part of which constellation
THE BIG DIPPER
Different constellations are visible in only…. Give me an ex.
1 of the EARTHS HEMISPHERES.
For example: if you live in the northern hemisphere you see differnet star constellations than someone living in the southern hemisphere
TAURUS aka THE BULL
SIRIUS Aka THE BRIGHTEST STAR
CENTAUR aka HALF MAN HALF HORSE
Can only be seen where
THE SOUTHERN HEMISPHERE
SIRUIS, the star is part of what constellation
CANIS MAJOR. THE DOG STAR
Why Stars look like they move?
BecAuse of the earths rotation
Why do constellations change with the seasons.. give example
Because the earth travels around the sun.
For example, the winter nights sky looks different than the summer nights sky.
PARAGRAPH: explain why constellations change over time
The stars that make up constellations appear to be constantly moving.
The earth rotates and revolves.
As the earth moves, the pattern of the stars in the night sky changes as well.
Name the different galaxies there are.
Spiral
elliptical
irregular
