The identification of spiral nebulae as large groupings of stars outside of our own galaxy was proven by ____.
a. photographic plates made by Edwin Hubble showing stars and Cepheid variables
b. the results of the Shapley-Curtis debate
c. Immanual Kant's island universe theory
d. William Parsons' observation and description of their spiral structure
e. Harlow Shapley's observations of their radio spectrum
Question 2
What does a refracting telescope use to gather and focus light?
a. eyepiece
b. mirror
c. lens
d. photometer
e. active optics
The "Emu in the sky," a constellation defined by dark clouds rather than the stars.
shelducks, genus Tadorna, are a group of large birds in the Tadorninae subfamily of the Anatidae
Variety in Spiral Arms
A Starburst Galaxy
The proboscis monkey demonstrates that large gut size contributes to a lower EQ.
Flow Patterns and Large-Scale Weather: The Steering of Midlatitude Cyclones