Light years,Theories and

Characteristicsof the Universe

Light year is: Distance that light travels in a vacuum in one year, about 9.5 trillion km- which is used to record distances between stars and galaxies

Light year is:

Light year is not: Light year is a

measure of DISTANCE – NOT TIME!!!!!!

Light year is:

Light year is:

SPEED of LIGHT is:

Lite Coke

Diet Coke

Diet Coke

SPEED of LIGHT is not:

BIG BANG THEORY is: A theory that states that about 12 billion to 15 billion years ago, the universe began with a huge, fiery explosion.

BIG BANG THEORY is:

BIG BANG THEORY is not:

BIG BANG THEORY is: A theory that states that about 12 billion to 15 billion years ago, the universe began with a huge, fiery explosion.

BIG BANG THEORY is:

UNIVERSE is:

the totality of everything that exists, including all matter and energy, the planets, stars, galaxies, and the contents of intergalactic space.

UNIVERSE is:

UNIVERSE is not:

UNIVERSE is:

UNIVERSE is:

Galaxy is:

Large group of stars, dust and gas held together by gravity; can be elliptical,

spiral, and irregular

Galaxy is:

Galaxy is not:

Galaxy is:

Irregular Galaxy

NEBULA is:

is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

WHERE A STAR IS BORN!

NEBULA is:

NEBULA is:

is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

WHERE A STAR IS BORN!

NEBULA is:

NEBULA is:

STAR is: A huge object in space made up of gas and giving off light and heat from nuclear reactions; the sun is a star

STAR is:

STAR is not:

STAR is:

MAIN SEQUENCE STAR is:

MAIN SEQUENCE STAR is:

A "main sequence star" is not really a type of star but a period in a stars life. When a star is in "main sequence" it is converting hydrogen into energy. It is then usually called a dwarf star. This is the longest period in a stars lifetime.

MAIN SEQUENCE STAR is:

MAIN SEQUENCE STAR not is:

MAIN SEQUENCE STAR is:

PLANETARY NEBULA is:

made up of gas and plasma, they are made by certain types of stars when they die.

PLANETARY NEBULA is:

PLANETARY NEBULA is:

PLANETARY NEBULA is not:

PLANETARY NEBULA is:

Luminosity is:

Luminosity is:

 a measure of the radiant power emitted by a star.

Luminosity is:

Luminosity is not:

Luminosity is:

 a measure of the radiant power emitted by a star.

Luminosity is:

Luminosity is:

 a measure of the radiant power emitted by a star.

Hertzsprung-Russell diagram is:

 a scatter graph of stars in which the absolute magnitude (intrinsic luminosity) of stars is plotted vertically against their surface temperature (or corresponding spectral types)

Hertzsprung-Russell diagram is:

Hertzsprung-Russell diagram is:

Hertzsprung-Russell diagram is not:

Hertzsprung-Russell diagram is:

ABSOLUTE MAGNITUDE is:

ABSOLUTE MAGNITUDE is:

a measure of the star's luminosity---the total amount of energy radiated by the star every second.

ABSOLUTE MAGNITUDE is:

ABSOLUTE MAGNITUDE is not:

APPARENT MAGNITUDE is:

The apparent brightness of a star observed from the Earth

APPARENT MAGNITUDE is:

APPARENT MAGNITUDE is not:

APPARENT MAGNITUDE is:

The apparent brightness of a star observed from the Earth

APPARENT MAGNITUDE is:

the "what you see is what you get" magnitude

APPARENT MAGNITUDE is:

The apparent brightness of a star observed from the Earth

APPARENT MAGNITUDE is:

Electromagnetic Spectrum is:

Electromagnetic Spectrum is:

Full range of electromagnetic waves

Electromagnetic Spectrum is:

Electromagnetic Spectrum is not:

Electromagnetic Spectrum is:

TROUGH is:

the lowest part of a wave; the part of a wave with the least magnitude.

TROUGH is:

TROUGH is not:

Get out of my

Trough!

TROUGH is:

the lowest part of a wave; the part of a wave with the least magnitude.

TROUGH is:

TROUGH is:

the lowest part of a wave; the part of a wave with the least magnitude.

TROUGH is:

CREST is:

CREST is:

the highest part of a wave; the part of a wave with the greatest magnitude.

CREST is:

CREST is not:

CREST is:

WAVELENGTH is:

WAVELENGTH is:

The distance between successive crests of a wave

WAVELENGTH is:

WAVELENGTH is not:

WAVELENGTH is:

FREQUENCY is:

FREQUENCY is:

the number of occurrences of a repeating event per unit time.

FREQUENCY is:

FREQUENCY is not:

FREQUENCY is:

NANOMETER is:

NANOMETER is:

1 billionth of a meter, written 10⁻⁹ m

NANOMETER is:

NANOMETER is:

Hertz is:Measurement of wave frequency equal to vibrations per second.

Hertz is:

Spectrometer is:

Used to measure the property of light