astronomy

Astronomy
the study of objects and proscesses outside the atmosphere
areas we will consider
1.our position iin space2. the earth’s movement through space3. the effect on earth’s
revolve
one object moving around another
barycenter
center of rotation
rotate
an object spinning on an axis
precession
change in rotational axis
nutation
swaying of ratational axis
redshift
away from earth
blueshift
moving toward earth
collective
up & down
cyclic
pitch & roll
antitorque
yaw
solar em
all seven types
solar wind
particles (mostly protons and electrons) streaming from sun
mass ejection
flares and coronal ejections
galactic cosmic radiation
background-no known source many different elemants
earth’s shape is due to
gravity
Earth’s shape is due to…
inertia
umbra
full shadow
springtide
(m) (e) (s)
neap tide
(()   (e)   ()) (s)
gyroscope
very fast spinning
blackhole

a collapsed object with such strong gravity that nothing can escape it; as a result, the object is black, and it is a hole because nothing can escape from it

Aperture
 the diameter of an opening through which light passes in an optical instrument
Black dwarf
a dead star with a maximum possible mass of 1.4 solar masses that has cooled to a point where it no longer glows with residual heat
Corona
 the high-temperature outermost atmosphere of the sun, visible from Earth only during a total solar eclipse
Eccentricity
a measure of how closely a planet’s orbit approximates to a perfect circle
Nova
a white dwarf star in a binary system that brightens suddenly by several magnitudes as gas pulled away from its companion star explodes in a thermonuclear reaction
Red giant
an old star whose outer layers have billowed out and cooled down
Super giant
the stage in the evolution of a massive star when its core contracts, its surface expands to about 500 solar radii, and its temperature drops, giving the star its red color
Supernova
an explosion of a massive star at the end of its life; the star may briefly equal an entire galaxy in brightness
White dwarf
a collapsed core of a normal star such as the sun after it has lost its outer layers

 

Ultraviolet
the portion of the spectrum with wavelengths just shorter than the bluest light visible

 

Penumbra
 the outer part of an eclipse shadow; also, the lighter area surrounding the center of a sunspot