# Missing Terms

### 15 terms by mellenbogen

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### Rarified

Having low density

### Kirchoff's 3 laws of spectral analysis

A hot solid or a hot, dense gas produces a continuous spectrum.
A hot, low-density gas produces an emission-line spectrum.
A continuous spectrum source viewed through a cool, low-density gas produces an absorption-line spectrum.

### electromagnetic wave

a wave that doesn't require matter to transfer energy

### e=mc2

theory of relativity, e=energy m=mass c=speed of light

### red giant star

a large cool star of high luminosity, a large cool star

### center of mass

the average position of the various mass elements of a body or system, weighted according to their distances from that center of mass that point in an isolated system that moves with constant velocity according to Newton's first law of motion

### SN 1987A

first supernova seen in 1987 first star to be observed before it was a supernova and after. Most of what we know today about SuperNovas came from this. seen in chili by a Canadian

### Core-collapse (Type II) Supernova

death of a massive star

### Thermonuclear (Type I a) supernova

when a white dwarf accumulates matter from a companion star at a much faster rate and is pushed over the chandrasekhar limit.

### James Clerk Maxwel

The scientist who worked out the mathematics of the connections between electricity, magnetism, and light in the 19th century was

### Hertz

s a unit of frequency, equivalent to once cycle per second

### photon

When a positron and an electron collide, they produce:

### About 1,000,000 years.

Roughly how long does it take for the energy from photons created by hydrogen fusion at the center of the Sun to reach the surface of the Sun?

### helium

The second most abundant element in the Sun, by mass, is:

### Main sequence, red giant, white dwarf

Which of the following is the correct life sequence for a low-mass star

Example:

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