study guide quiz #6
what percent of light the moon reflects
12 percent
earth rotation period
23 hours, 56 minutes
Distance between Earth and Sun, what is an AU, what is a light year
92.96 million, a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun, a unit of astronomical distance equivalent to the distance that light travels in one year
orrery model of the solar system
An orrery is a mechanical model of the solar system that illustrates or predicts the relative positions and motions of the planets and moons, usually according to the heliocentric model
galaxy/main types
Elliptical, Spiral, and Irregular
heliocentric model of the solar system
Heliocentrism is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Solar System.
moon phases
New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, and Waning Crescent
formation of our solar system
S Scientists believe that the solar system was formed when a cloud of gas and dust in space was disturbed, maybe by the explosion of a nearby star (called a supernova) this explosion made waves in space which squeezed the cloud of gas and dust
space prob
a blunt-ended surgical instrument used for exploring a wound or part of the body
world planet
a celestial body moving in an elliptical orbit around a star
black hole
a region of space having a gravitational field so intense that no matter or radiation can escape
axis
an imaginary line about which a body rotates
sequence and size of each planet and pluto
jupiter (69,911 km / 43,441 miles, 1,120% the size of earth), Saturn (58,232 km / 36,184 miles, 945% the size of Earth), Uranus (25,362 km / 15,759 miles, 400% the size of Earth)Neptune (24,622 km / 15,299 miles, 388% the size of Earth), Earth (6,371 km / 3,959 miles), Venus (6,052 km / 3,761 miles, 95% the size of Earth)Mars (3,390 km / 2,460 miles53% the size of Earth), Mercury (2,440 km / 1,516 miles, 38% the size of Earth)
why do stars twinkle
light passes down through a volume of air, turbulence in the Earth's atmosphere refracts light differently from moment to moment
Revolution period of Mercury and Jupiter
mercury is 87.97 days and jupiter is 11.86 years
Order of the phases of the Moon and the order of the Sun, Earth and Moon during
new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter waning crescent, and new moon again. is the highest award bestowed by the nation of Peru to commend notable civil and military merit. A total eclipse occurs when the dark silhouette of the Moon completely obscures the intensely bright light of the Sun, allowing the much fainter solar corona to be visible. During any one eclipse, totality occurs at best only in a narrow track on the surface of Earth
why stars twinkle
stars twinkle because light passes though a volume of air turbulence earth atmosphere refracts light differently from moment to moment
Elliptical orbits and eccentricity
the orbital eccentricity of an astronomical object is a parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit, values between 0 and 1 form an elliptic orbit, 1 is a parabolic escape orbit, and greater than 1 is a hyperbola
Rotation and revolution of the Moon around Earth
the rotation of the moon is 27.32 days the revolution of the moon is 28 days