Space I
The galaxy we live in
What is the Milky Way?
An area containing no air or any other matter.
What is vacuum?
The visible surface of the sun.
What is photosphere?
Stars that outline a picture in the sky.
What is a constellation?
The sun's distance from the earth.
What is 93 million miles?
This space structure is shaped like an egg or football.
What is a galaxy?
A pair of stars that travel together.
What is a binary star?
A star system containing from millions to billions of stars.
What is a galaxy?
A large cloud of gas and dust floating in space.
What is a nebula?
The pole star in the Northern Hemisphere.
What is Polaris?
The imaginary line that stretches from pole to pole.
What is the axis of rotation?
Darker spots or blotches that slowly move across the face of the sun as the sun rotates.
What are sunspots?
Spiral, elliptical, and irregular.
What are the three basic types of galaxy shapes?
A high-speed stream of particles that travels outward from holes in the sun's corona and beats upon the earth's upper atmosphere.
What is a solar wind?
A galaxy that resembles an egg or a football.
What is an elliptical galaxy?
A galaxy that is composed of stars clumped together in no definite shape.
What is an irregular galaxy?
The hottest region of the sun's atmosphere which extends hundreds of thousands of miles from the sun's surface.
What is corona?
The brightest star in the constellation Perseus.
What is Algol?
In what region of the earth's atmosphere is the harmful ultraviolet radiation filtered out
What is an ozone layer?
The three galaxies closest to ours.
What are the Sagittarius, Dwarf and Large and Small Magellanic Clouds.
The closest star to earth.
What is the sun?
The force that resists motion.
What is friction?
A galaxy shape the spiral arms are attached to a straight bar that runs through the center of the galaxy.
What is a barred spiral galaxy?
The distance that light travels in one year.
What is light year?
The heavenly body that Copernicus believed was the center of the universe
What is the sun?
The length of time it take for the earth to complete its revolution
What is 365 1/4 days?
The cluster of about 40 galaxies in which we find Earth.
What is the Local Group?
The hottest region of the sun.
What is the core?
A scientist who study outer space.
What is an astronomer?
A galaxy shape that have a central nucleus that resembles a flattened ball to which are attached long, curved arms.
What is a spiral galaxy?
The brightest star in the night sky
What is Sirius?
Streams of gas erupting from the chromosphere and returning in looplike fashion.
What is a solar prominence?
The actual explosion of a star.
What is a supernova?
The brightest star in the night sky.
What is Sirius?
"This event causes a star to suddenly flare up to many times its original brightness."
What is a nova?
The study of outer space and all that it contains.
What is astronomy?
A vacuum, no air friction, mostly black, weightlessness, extremes of temperature.
What are the characteristics of space?
The closest star to Earth besides our sun.
What is Proxima Centauri?
The hottest region of the sun's atmosphere.
What is the corona?
The brightest star in the constellation Leo.
What is Regulus?
The familiar shape within the constellation Ursa Major which contains the pointer stars.
What is the Big Dipper?
This type of magnitude describes a star's brightness as seen from Earth, while another type describes its actual brightness.
What are apparent & absolute magnitudes?