AST 3033 Exam 1

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M101 details?

27mil LY away, supernova explosion, pinwheel galaxy

What is the magnitude of mintaka?

-4.84

What is the magnitude of rigel?

-6.96

What is the history of the universe?

13.82 +/0 .05 billion years old, Pangea

What is eclipsing binary?

2 stars covering each other

Telescopes

7mm to 70 mm it's 10 times bigger, but you see it 100X's bigger

What do the universe look like?

Earth, stars, matter

What is a nebula?

a cloud of gas and dust

What do telescopes do?

capture a greater quantity of light from an object than our unaided eyes can see

What is a constellation?

collections of stars that lie relatively close to one another on the sky and that form a recognizable pattern

What do different colors mean in stars?

different temps; young stars are blue, old stars are red (young can be red if weak?)

What is a galaxy?

fuzzy objects in the sky that have similarities in structure

What are the characteristics of the irregular galaxy?

galaxies that don't fit into other categories

What rules does the universe follow?

gravity, patterns

What is the universe made of?

human body, earth, surrounding solar systems, about a hundred elements, electromagnetic force

What is the wavelength equation? for light?

landa=v/f; landa=c(3X10^8m/s)/f

What are light waves and frequency measured in?

nm(10^-9) and hertz

What are the characteristics of the elliptical galaxy?

no spiral arms, no distinguishing features; classified according to how circular/elongated they are

What is uncertainty?

numerical expression of the precision of a measurement, specifies the repeatability of the method of measurement

What are the characteristics of the barred spiral galaxy?

spiral galaxy that has a central bulge with a bar shape

What are the characteristics of the spiral galaxy?

spiral structure, arms are clumpy and tightly wound

What are the types of galaxies?

spirals, barred spirals, ellipticals, irregulars

What are planets?

star-like points that move around the sky like the moon ie "wanderer", spherical bodies that move around stars in particular paths

What is the Earth's axis?

the imaginary line running straight through the Earth from North to South pole

What does the magnitude tell you about the star?

the lower the magnitude the brighter the star

What is cosmology?

the study of the universe as a whole

scientific law vs therory

theory is proposed explanation, law is theory

What did william parsons do?

used a 1 ft telescope to draw a spiral nebula

How did life consciously arise?

we are part of the universe, we are a way for the universe to understand itself

What is the future of the universe?

where is it going, will it end/ restart? will life still exist/evolve to adapt?


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