A solar eclipse can only occur at a
Which of the following constellations cannot be seen in the summer sky of the northern hemisphere?
What percent of stars in the sky that appear to be single stars are actually binary stars?
The apparent speed of the Sun along the ecliptic?
In the Australian winter night sky, which of the following is true regarding the constellation Orion
It is seen in the northern sky
The 29.5 days it takes the moon to complete an orbit around the earth is called a
Which of the following is NOT true about meteorites
on rare occasions, acid-etched iron meteorites display a pattern called the Widmanstatten pattern.
According to Kepler's Third Law, plotting the squares of the periods of the planet against the cubes of the semi-major axes of their orbits will result in what sort of graph
a straight line
The time between two successive meridian transits of the Sun as observed from a stationary spot on the Earth's surface is called
an apparent solar day
THe hydrogen envelope that surrounds the comet's nucleus dervices its hydrogen most directly from
breakdown of water by ultraviolet light
At a location half-way from the Equator to the North Pole, which of the following correctly describes the stars apparent motion
they rise and set at an angle to the horizon
Light from distant galaxies comes mostly from which of the following
high mass stars
Which of the following is NOT a superior planet
Which of the following planets has the highest escape velocity
What is the term for the amount of energy released from each square meter of an object's surface each second
Astronomers usually detect the electromagnetic emissions of a single neutron start in what single form
An emission or bright line spectrum consists of
a series of bright lines superimposed on a black or continuous background
Maria on the moon are
darker and smoother parts of the moon's surface
Which of the following is NOT another name for the Pleides
the bull's bowl
Which of the following is a pulsating variable star whose brightness varies in a very regular time period of about 1-50 days
Name the part of the Sun that we can see without any instruments
All of saturn's moons are composed predominately of what substance?
Rounded off to the nearest trillion, how many miles is in a light year?
Of the three types of meteorites, which is the most common, in terms of the number of samples, to fall to the Earth in recorded history
What are the scientific names for the two regions of a sunspot?
Umbra and Penumbra
The Kappa Cygnids and the Nothern Delta Aquarids are names for what phenomena?
What substance is responsible for Neptune's blue-green color?
Give the common name for the phenomenon which is the result of sunlight reflecting off the earth and faintly illuminating the darkened portion of the moon
Whose book, titled "Concerning the Revolutions of Celestial Spheres," is considered to mark the birth of modern astronomy?
The celestial coordinate analogous to latitude is called
What do Astronomers call the point in the sky that is directly overhead?
A meteor that reaches the surface of the Earth is more accurately called a
Which planet in our solar system has the most circular orbit?
Mars has a thin atmosphere composed mainly of what gas?
Which moon is the only other body in our solar system, besides the Earth, that has an atmosphere of mostly nitrogen?
When a superior planet is at quadrature in reference to the Earth, what is its elongation in degrees?
What moon of Neptune orbits in a retrograde direction?
What is the name for the celestial body of interstellar gas and dust where stars are sometimes born?
Based on "best altitude conditions" during what month in the northern hemisphere is the best time to observe the full moon?
The work of this Harvard College Observatory scientist made possible the first accurate determination of extragalactic distances by what is often called Henrietta's Law