Test 7 (4.1-4.4) Flashcards
The three basic types of galaxy shapes
spiral, elliptical, and irregular
The study of outer space and all that is contained
astronomy
A high speed stream of particles that travels outward from holes in the sun’s corona and beats upon the earth’s upper atmosphere
solar wind
Dark patches on the sun’s photosphere
sunspots
Part of the sun visible only during a solar eclipse.
chromosphere or coron
Large clouds of gas and dust floating around in space
nebulae
stars that outline a picture in the sky
constellation
an area that contains no air
vacuum
familiar shape within the constellation Ursa Major which contains pointer stars
Big Dipper
the force that resists motion
friction
the hottest region of the sun
core
spiral arms attached to a straight “bar” that runs through a galaxy
barred spirals
streams of gas erupting from the chromosphere and returning in loop like fashion
solar prominence
The brightest star in the constellation Perseus
Algol
The brightest star in the night sky
Sirius
The brightest star in the constellation Leo
Regulus
The pole star is know as what?
Polaris
The closest star to the earth
the sun
The actual explosion of a star
supernova
The imaginary line that stretches from pole to pole
axis of rotation
A pair of stars that travel together and rotate around each other as the mood does the earth
binary star
Star system containing millions to billions of stars
galaxy
The hottest region of the sun’s atmosphere
corona
The cluster with about 40 galaxies in which we find Earth
Local Group
The sun is located how far from the earth
93 million miles
The part of the sun’s atmosphere closest to its surface
chromosphere
Be able to identify the following constellations
Southern Cross, Cygnus, Draco, Andromeda, Cassiopeia
Be able to describe what space is like. Include at least three things that make space different from Earth and its atmosphere. Complete sentences are required
no air (vacuum), no air friction, mostly black, unusual activities (weightlessness), extremes of temperature
What is the difference between apparent magnitude and absolute magnitude?
Apparent magnitude is the measurement used to describe the brightness of a star as it appears from Earth. The actual brightness of a star is called its absolute magnitude.
