sir isaac newton:
a. proposed the elliptical orbit of the planets
b. applied mathematical reasoning to many astronomical theories
c. used mathematical calculations to discover the planet neptune
d. all of the above
the goddard space flight center is a major nasa space research laboratory. its name commemorates the contributions of robert goddard to:
a. cepheids
b. rocketry
c. red shift method
d. heliocentric theory
the greeks assigned what magnitude to the brightest stars seen in the night sky?
a. 1
b. -1
c. 6
d. 6+
the apparent magnitude of vega is 0. the apparent magnitude of canopus is -0.7. vega is brighter than canopus.
true
false