THE EARTH-MOON-SUN SYSTEM
Cards (38)
- Turning, or spinning, of a body on its axis
- Motion of a body, such as a planet or moon, along a path around some point in space
- Method of determining eclipses
- Very slow motion
- Highest point in the sky
- When the sun has reached its zenith
- Time interval from one noon to the next, which averages about 24 hours
- Time it takes for Earth to make one complete rotation (360 degrees)
- Direction to the sun, changes by almost what degree each day?
- Period of 23 hours, 56 minutes, and 4 seconds
- Average distance of Earth from the sun
- Earth is closest to the sun
- Perihelion occurs about what year?
- Earth is farthest from the sun
- Aphelion occurs about what year?
- The apparent annual path of the sun against the backdrop of the celestial sphere
- The imaginary plane that connects Earth’s orbit with the celestial sphere
- Earth’s axis of rotation is tilted about
- Earth has one natural satellite
- The moon’s orbit is elliptical, its distance to Earth varies by about what percent?
- The moon is closest to Earth
- The moon is farthest from Earth
- Result of the motion of the moon and the sunlight that is reflected from its surface
- The cycle of the moon through its phases requires 29½ days, a time span
- Apparent period of the moon’s revolution around Earth and not the true period, which takes only 27⅓ days
- Moon rotates on its axis only once every?
- Occurs during new-moon phases. When the moon moves in a line directly between Earth and the sun, it casts a dark shadow on Earth
- within Earth’s shadow.
- Earth’s circular shadow can be seen moving slowly across the disk of the full moon
- Moon is completely within Earth’s shadow, but it is still visible as a coppery disk
- Long-wavelength light
- A total eclipse of the moon can last up to how many hours?
- See the moon slowly block the sun from view and the sky darken
- Total solar eclipses
- Partial eclipse