GENERAL GEOLOGY (EARTH VALUES) Flashcards
Astronomical Unit (Au)
150 Million Km
Circumference of Earth
40,075 km
Ave Distance of Moon to Earth
384,401 km
Zodiac
A band in the sky on which the sun, moon and starrs move along
Total number of constellation
88
Brightest star in Orion located SE
Rigel (Blue White)
Beta Orionis
Alpha Orionis
Betelgeuse (Red Supergiant)
Stars located at the sword of Orion
Trapezium or Orion Nebula
Brightest Star in Canis Majoris
Sirius
Current North Star
Polaris
Earth’s Equator:
Celestial Equator
Earth’s Latitude:
Declination
Earth’s Longtitude
Right Ascenision
Vernal equinox
The point in the sky where the sun crosses the celestial equator at the onset of spring (Mar 21)
1 Hour = how many dregees of earth’s Rotation?
15 degrees
Rotation
Spinning of a body on its axis
Revolution
the motion of body along a path around a point in space
Axial Precession
the gradual change of the orientation of Earth’s Axis or the wobble
Mean Solar Day
24 Hrs the time interval from one noon to the next
Noon
the time when the sun has reached its highest point in the sky
Sidereal Day
the time its takes for earth to complete a rotation relative to a reference star other the sun. Measured by conunting the time interval for a star to reappear on the same position in the sky
length of sidereal day
23Hrs 56 mins 4 secs
Mean Earth Speed
107000 Km/hr
Distance from Earth to su
150 M km or 1 astronomical unit