a small part of an array of energy
the study of properties of light that depend on wavelength
an instrument that uses a lens to bend or refract light.
an instrument that uses a concave mirror that focuses the light in front of the objective rather than behind it, like a lens.
detects radio waves accomplished by big dishes of these machines.
it radiates most of the sunlight we see and appears as the bright disk of the sun
above the photosphere, a thin layer of hot, incandescent gases a few thousand kilometers thick
flamelike structures that extend upward
outermost portion of the solar atmosphere, visible only when the photosphere is covered.
streams of protons and electrons that boil from the corona
dark blemishes on the surface of the sun
huge cloudlike structures consisting of concentrations of chromospheric gases.
brief outbursts that normall last an hour or so and appear as a sudden brightening of the region above a sunspot cluster.
the source of the sun's energy, not discovered until the late 1930s
a nucleur reaction, converts four hydrogen nuclei into the nucleus of a helium atom.