10 Questions
The Sidereal Day is exactly 24 hours long.
False
The Solar Day is constant in length throughout the year.
False
The North Celestial Pole is directly above Earth's South Pole.
False
The Meridian extends from horizon due east, through the zenith, to horizon due west.
False
Greatest Elongation occurs when a planet appears closest to the Sun in our sky.
False
Celestial Equator is the extension of Earth's equator onto the celestial sphere.
True
Zenith has an altitude of 0º.
False
The Sidereal Day is longer than the Solar Day.
True
Local Sky refers to the sky as viewed from space stations orbiting Earth.
False
Celestial Navigation uses coordinates of altitude and distance to pinpoint objects in the local sky.
False
Explore the Julian Day system invented by Joseph Scaliger, designed to easily compute the difference between calendar dates and express observations relative to a fundamental epoch. Learn about the convergence of three cycles within the system.
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