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Flashcards / characteristics of the universe

characteristics of the universe

characteristics of the universe

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School: University of Scranton
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Tags: University of Scranton
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Name: characteristics of the universe
Uploaded: 04/09/2016
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Universe

everything that exists, including the sun, stars, all the planets, and outer space

Star

a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior

Nebulae

massive clouds of dust and gases where stars are born

Galaxy

(astronomy) a collection of star systems

Hertsprung-Russel Diagram

A graph that shows the absolute magnitude and temperature of stars.

Scientific Theory

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

Elliptical Galaxy

A galaxy shaped like a round or flattened ball, generally containing only old stars.

Spiral Galaxy

a galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern

Milky Way

the name of our galaxy, a spiral galaxy that contains about 400 billion stars

Irregular Galaxy

one with an irregular shape

Sunspot

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

Prominences

huge, arching columns of gas. may be caused by intense magnetic fields from sunspots. some blast material from sun into space

Flares

a violent eruption on the sun's surface

Wavelength

The distance between crests of waves, such as those of the electromagnetic spectrum.

Electromagnetic Spectrum

All of the frequencies or wavelengths of electromagnetic radiation

Light Wave

2 transverse waves that run perpendicular to one another. electrical and magnetic

Radio Wave

an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m

Microwave

a short electromagnetic wave (longer than infrared but shorter than radio waves)

Infrared Wave

Electromagnetic waves with wave lengths between 1mm and 0.7millionths of a meter

Visible Waves

all colors have different wavelengths, travel at same speed-combine to make white light

Ultraviolet Wave

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.

X-Ray

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

Gamma Ray

electro magnetic wave with no mass or charge that travels speeds of light and is emitted through alpha or beta particles