It casts shadows in sunlight, is a tall pillar like thing, used to estimate time of day, and is part of a sundial.
What is a gnomon
100
Used to tell a location of something, measured in North or South, and East or West.
What is latitude and longitude.
100
The measure of relative brightness, and a system of assigning it was established by Hipparchus
What is magnitude
100
Variable star pairs.
What is eclipsing binaries.
100
Made a catalog of all the "fuzzy looking stars", and gave them a number.
Who is Charles Messier.
200
A handheld instrument having a movible index arm that indicated the angle of elevation between a star, the sun or moon, and the horizon.
What is a quadrant.
200
Designed a system to identify stars in constellations by using greek or roman letters.
Who is Johann Bayer.
200
Distance light travels in a year; roughly 5.9 trillion miles.
What is a light-year.
200
When a star expands and contracts, and how long it takes to go from brightest to dimmest, and back to brightest.
What is cepheid variables, and period.
200
Listed over 13 thousand "fuzzy objects", and also assigned them a number.
Who is J. L. E. Dreyer.
300
One of the first to investigate the use of lenses.
Who is Roger Bacon.
300
Plane of earths equator projected into the sky.
What is celestial equator.
300
A way of measuring things that are very, very, far away.
What is red shift.
300
A star that will be visible for several months or years, then will fade away.
What is a nova.
300
The five kinds of nebulae.
What is emission, reflection, planetary, supernova remnants, and dark.
400
Four types of telescopes.
What is refractor, reflector, composite, and radio.
400
A stars angular distance north or south of celestial equator.
What is declination.
400
The movement of a star across the sky as we see it, and was first detected by Edmund Halley.
What is proper motion.
400
A star that is completely destroyed when it explodes.
What is a supernova.
400
A mysterious object that emits strong radio waves, and is among the brightest things known.
What is a quasar.
500
Three kinds of telescope mounts.
What is altazimuth, equatorial, and Dobsonian.
500
longitudinal position of a star, and measured in hours.
What is right ascension.
500
The movement of a star directly toward or away from us.
What is radial motion.
500
An extremely dense, small, dark, star with neutrons, and is created when a supernova explodes.
What is a neutron star.
500
A small abject or region in space with gravity so intense that it is believed that matter, energy, and even light cannot escape from within its boundaries.