everything that exists, including the sun, stars, all the planets, and outer space
a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
massive clouds of dust and gases where stars are born
(astronomy) a collection of star systems
A graph that shows the absolute magnitude and temperature of stars.
An explanation supported by many tests and accepted by a general consensus of scientists.
Origin of the Universe
Theories such as creationist, big bang, and others that explain the start of our universe as we know it
A galaxy shaped like a round or flattened ball, generally containing only old stars.
a galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
the name of our galaxy, a spiral galaxy that contains about 400 billion stars
one with an irregular shape
an area of the Sun that is cooler and not as bright as surrounding areas and that is caused by the Sun's intense magnetic field
huge, arching columns of gas. may be caused by intense magnetic fields from sunspots. some blast material from sun into space
a violent eruption on the sun's surface
The distance between crests of waves, such as those of the electromagnetic spectrum.
All of the frequencies or wavelengths of electromagnetic radiation
2 transverse waves that run perpendicular to one another. electrical and magnetic
an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m
a short electromagnetic wave (longer than infrared but shorter than radio waves)
Electromagnetic waves with wave lengths between 1mm and 0.7millionths of a meter
all colors have different wavelengths, travel at same speed-combine to make white light
Electromagnetic waves with wavelengths from about 400 billionths to 10 billionths of a meter. They are energetic enough to enter skin cells. Overexposure to these waves can cause skin damage and cancer.
a type of radiation that can go through many solid substances, allowing hidden objects such as bones and organs in the body to be photographed
electro magnetic wave with no mass or charge that travels speeds of light and is emitted through alpha or beta particles