These are more convenient than miles, kilometers or AUs for measuring objects in deep space.
What is a light-year (ly)?
100
Represents an area of the sky, and any star within the region belongs to one and only one of these
What is a constellation?
100
Difference between rotation and revolution
What is the turning of a body on its own axis and the motion of a body around a point outside of the body.
100
A method of writing or displaying numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10
What is scientific notation?
100
marks the bottom of the sky directly under an observer's feet
What is the nadir?
200
Astronomers use it because it simplifies calculations and use it for expressing very large and very small numbers.
What is scientific notation?
200
The apparent motion of the stars is caused by this
What is the rotation of the Earth on its axis?
200
Moon and sun form a right angle with Earth.
What are 1st quarter and 3rd quarter?
200
A carefully devised conception of how something works
What is a scientific model?
200
why we have the seasons
What is Earth's axis of rotation is tipped 23.5 degrees from the perpendicular of its orbit as it revolves around the Sun?
300
a great cloud of stars, gas, dust, some planets held together by the combined gravity of all the matter
What is a galaxy?
300
A scientific model of the sky to which the stars appear to be fixed.
What is the celestial sphere?
300
this is caused when the moon passes between the Earth and the Sun and covers the disk of the sun
What is a solar eclipse?
300
the unit of distance that is the average distance from Earth to the sun
What is an astronomical unit (AU)?
300
produced by sunlight illuminating different parts of the side of the moon you can see
What are phases of the moon?
400
The order of the following from largest to smallest:
planet, galaxy, universe, nebula, Sun, galaxy clusters
What is universe, galaxy clusters, galaxy, nebula, Sun, planet
400
These stars are the faintest stars visible to the human eye
What are sixth magnitude stars?
400
Earth would be in this phase if you were on the moon when the moon was full.
What is new moon?
400
how bright the stars look to an observer from Earth
What is apparent visual magnitude?
400
how long the moon takes to circle the sky once and return to the same position among the stars. Takes 27.32 days.
What is the moon's sidereal period?
500
The scale that atoms are on
What is angstrom (10^-10 m)?
500
You would detect this by examining star charts from ancient Egypt
What is precession? The sweeping of Earth's axis of rotation like a top due to the gravitational pull of the Sun and the moon as Earth spins. (see p. 18-19)
500
this can occur if the moon moves through the shadow of the Earth at full moon
What is a lunar eclipse?
500
informally defined groupings of stars that represent animals, people, etc.
What is an asterism?
500
a complete cycle of lunar phases taking 29.53 days