AST 3033 Exam 1
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?