Show:
Scientists
Class of Stars
H-R Diagram
Life Cycles of Stars
Astronomy Terms
100
Who observed other galaxies are moving away from Earth?
Who is Edwin Hubble
100
Which category of stars comprises 90% of the stars in our universe?
What is Main Sequence stars
100
Which category of stars appear in the lower left as hot, dim stars?
What are White Dwarfs
100
In a star the same mass as our sun (low mass)- name the next 3 phases after nebula, protostar and main sequence
What is red giant, planetary nebula, white dwarf
100
What term best describes a region of space with an intense gravitational field preventing matter and light from escaping?
What is a black hole
200
Who developed the 7 spectral classes of stars?
Who is Annie Cannon?
200
Which category contains the most common, cool, and longest-lived stars?
What are Red Dwarfs
200
Which category of stars appears in the upper right as cool, bright stars?
What are Red Supergiants
200
What term describes the violent explosion of a very massive star releasing tremendous energy?
What is Supernova
200
Light moving away from you in longer wavelengths and light moving closer to the source in shorter wavelengths best describes ______ and __________ respectively.
What is Red Shift and Blue Shift
300
Who discovered the Milky Way?
Who is Galileo
300
What happens to the parallax angle as the distance to a star increases?
What is the angle decreases
300
Which is the largest and most prominent category of stars in the H-R diagram?
What are Main Sequence stars
300
In a high mass star about 3 times the mass of our Sun- name the next 3 phases after nebula, protostar, main sequence
What is red supergiant, supernova ll, neutron star
300
What term describes the brightness of stars we see from our position on Earth?
What is Apparent Magnitude
400
Who created three classes of galaxies based on their visual appearance?
Who is Edwin Hubble
400
What two factors require a delicate balance to establish stability in stars?
What is gravity (inward force) and force of fusion (outward pressure) due to its internal pressure/temperature.
400
Which of these is a blue-white star with a magnitude of 8.1 and approximate 12,000 K temperature? Deneb, Rigel, Betelgeuse, Sirius
What is Rigel
400
In a high mass star 5-10 times the mass as our Sun name the next 3 phases after nebula, protostar, main sequence?
What is Red Supergiant, Supernova ll, Black Hole
400
What term describes the apparent shift or change in a star’s position due to observer location?
What is parallax
500
Who developed a diagram showing the relationship between the absolute magnitude of stars and a star’s spectral type [later added Kelvin temperature]?
Who is Hertzsprung- Russell
500
Which factor classifies stars by color?
What is Temperature
500
Which of these is a red supergiant with a magnitude of 5.8 and approximate 3,400 K temperature? Our Sun, Sirius, Mira, Betelgeuse
What is Betelgeuse
500
Which of these is correct if more heavy elements like silicon and iron appear in a star’s core? [Forming a bright, new star, Star beginning to undergo a supernova, Expansion into a red giant, or Slowly dying old star ]
What is star beginning to undergo a supernova
500
Which unit measures distances to stars closest to Earth? Which unit measures distances to very distant stars in other galaxies?
What is Light Year What is Parsec