What is this?
A Galaxy
A Globular Cluster
A Planetary Nebula
A Supernova Remnant
The OBSERVABLE UNIVERSE includes
ALL of the Stars, Galaxies, and Planets that exist today.
Stars so far away that their light has not yet reached Earth.
Everything we can see or detect with instruments.
Everything there is, ever was, or ever will be.
Which is true of a star on the Celestial Sphere with coordinates of: RA 8 Hours (right ascension) Dec +28 degrees (declination)
It would be visible to an observer in the Northern Hemisphere.
It would be visible to an observer in the Southern Hemisphere.
It would be directly overhead to an observer at the Equator.
These coordinates do not exist on the Celestial Sphere.
Currently, our Sun is
A Red Giant star
A Blue Giant star
A Yellow Dwarf star
A Yellow Giant star
Polaris, the North Star, is a Yellow Supergiant star. Which of these are true of Polaris? (Hint: there is more than 1 correct answer)
Polaris is much larger than the sun.
Polaris is much brighter than the sun.
Polaris is much hotter than the sun.
Polaris is located at or very near the North Celestial Pole.
Which of these galaxies must be an artist's drawing and not an actual photograph?
Milky Way Galaxy
Andromeda Galaxy
Pinwheel Galaxy
Sombrero Galaxy
The Horsehead Nebula is a ❌.
Which of these is the Constellation Orion?