According to CERES, the amount of solar energy received at the North Pole is 30% higher during the summer solstice than the amount of solar energy received at the Equator.
Clouds do most of the reflecting in these NASA images. (In fact, CERES, the instrument responsible for these images, stands for Clouds and Earth’s Radiant Energy System.)
- Solar radiation measured by CERES includes not just the visible spectrum of light, but ultraviolet and infrared—wavelengths too short (ultraviolet) or too long (infrared) for the human eye to see.
scientific measurement of the amount of sunlight that is reflected by a surface.
half of a sphere, or ball-shaped object.
process of determining length, width, mass (weight), volume, distance or some other quality or size.
(National Aeronautics and Space Administration) the U.S. space agency, whose mission statement is "To reach for new heights and reveal the unknown so that what we do and learn will benefit all humankind."
to rebound or return light from a surface.
object that orbits around something else. Satellites can be natural, like moons, or made by people.
period of the year distinguished by special climatic conditions.
light and heat from the sun.
astronomical event that occurs twice a year, when the sun appears directly overhead to observers at the Tropic of Cancer or the Tropic of Capricorn.
visible radiation from the sun.
very large or important.