Vocab
a circular movement of an object around a center of rotation.
what is rotation?
An imaginary line around which an object rotates.
whats an axis?
the study of celestial objects, space, and the physical universe.
whats astronomy?
planetary orbits are elliptical.
whats kepler's first law?
the nearest star to Earth and has a diameter 100 times greater than Earth’s
the action by a celestial body of going round in an orbit or elliptical course.
whats revolution?
the angle between an object's rotational axis and its orbital axis.
whats tilt?
it's made of billions of galaxies.
what is the universe?
the speed at which any planet moves through space is constantly changing.
What's Kepler’s 2nd law?
reaches a temperature of 5,500 degrees Celsius. A small part of this energy reaches Earth as light and thermal energy.
laws of planetary motion.
what are kepler's laws?
An oval or oblong figure.
what's an ellipse?
It's made up of many stars.
a planet that is farther away from the sun will have a longer orbital period.
whats Kepler’s 3rd law?
what causes seasons?
earths orbit
The direction in which earth’s axis points changes very slowly over time without a change in tilt.
whats precession?
the emission of energy as electromagnetic waves.
whats radiation?
it often has solar systems.
what is stars?
A planet moves fastest when it is closest to the sun and slowest when it is farthest from the sun.
whats Kepler’s 2nd law?
what causes day and night?
Earth revolving around the Sun.
The moon pulls on Earth and Earth pulls on the moon, causes a change in the tilt of the Earth’s axis.
whats nutation?
The point between 2 or more objects where they balance each other.
whats barycenter?
what are solar systems?
what does perihelion mean? What does aphelion mean?
Because Earth’s surface is ______, different parts of Earth’s surface receive different amounts of the Sun’s energy.
what is curved?