WHY IS THE SKY RED AT SUNSET?
The path of the sun's rays are longer at sunset than noon. The light must travel farther through the atmosphere before it gets to us. As less reaches you directly, the sun appears less bright. This is because even more of the (short wavelengths) blues and
WHY IS THE SKY A SPHERE?
In our perspective, our point appears to be equally far away from all directions. It's an illusion, so we are forced to see a "dome
WHY DOES THE SUN RISE, OR SET?
the earth rotates west to east, the sun doesn't rise. We see the sun "rise" in the east and "set" in the west.
WHOS IS PTOLEMY?
He believed the earth was the center of the universe, and that objects orbit around it in a circular way, not elliptical. He also believed the Earth is completely at rest. He developed the GEOCENTRIC SYSTEM. He wrote the book "Almagest" which had 13 volum
WHAT IS RETROGRADE MOTION?
Planets moved around small circular paths that in turn moved around larger circular orbits around the Earth. Since earth passes mars when orbiting the sun, it seems as if mars is going backwards, when in reality we are moving forward.
WHO IS ERATOSTHENES?
He invented the system of longitude and latitude. Put a stick on the ground and noticed the shadow was round, and proved the earth was a sphere. He was the first one to calculate the circumference of the earth and the tilt of it's axis.
WHO IS COPERNICUS?
He founded the Heliocentric system and proved ptolemy wrong based on intuition. The sun is the center of the universe, not the earth. Wrote the book "The Revolutions of Heavenly Bodies
WHO IS KEPLER?
He believed everything was a sphere. Worked for Tycho Brahae and was a mathematician. Discovered that the Earth and planets travel about the sun in elliptical orbits. He gave three fundamental laws of planetary motion.
KEPLER'S 1ST LAW
PLANETS ORBIT THE SUN IN ELLIPTICAL ORBITS. THE SUN IS POSITIONED AT THE FOCI OF THE ELIPSE.
KEPLER'S 2ND LAW
THE CLOSER (PERIHILION) A PLANET IS TO THE SUN, THE FASTES IT ORBITS, AND THE FURTHER (APHELION) A PLANET IS TO THE SUN THE SLOWEST IT ORBITS.
KEPLER'S 3RD LAW
(THE PERIOD THAT IT TAKES A PLANET TO ORBIT THE SUN(2)= (AVG. DISTANCE BETWEEN THAT PLANET AND THE SUN(3).... P(2)=A(3)
WHAT IS WEIGHT?
FORCE OF GRAVITY. MASS IS ALWAYS THE SAME.
PROTON
POSITIVE ATOMS INSIDE THE NUCLEUS THAT DETERMINE AN ELEMENT
WHAT IS INSIDE THE NUCLEUS?
PROTONS AND NEUTRONS
WHAT IS SCATTERING?
forms of radiation, such as light, sound, or moving particles, are forced to deviate from a straight direction. rerouted.
ABSORPTION
A photon approached a two level atom, interacts, and moves out.
ION
an atom or molecule where the total number of electrons is not equal to the total number of protons, giving it a net positive or negative electrical charge.
FROM LAT LOCATION, HOW MANY DEGREES ABOVE THE THE NCP OR SCP?
SAME AS LAT DEGREES
FROM LAT LOCATION, HOW MUCH OF THE SCP OR NCP DO I SEE?
90 DEGREES-LAT DEGREES
FROM THE EQUATOR, I CAN SEE BOTH THE N AND S CELESTIAL POLES?
TRUE
WHERE IS THE NCP, FOR SANTA?
AT HIS ZENITH
WHERE IS THE CELESTIAL EQUATOR FOR SANTA?
AROUND HIS HORIZON
ECLIPTIC
the apparent path that the Sun traces out in the sky during the year.
THE MAX A SOLAR ECLIPSE CAN LAST
7 1/2 MINUTES
HIPPARACHUS
With his solar and lunar theories and his trigonometry, he may have been the first to develop a reliable method to predict solar eclipses. proved the earth is a sphere because of shadow on moon.
FORCE (newtons 2nd law)
force= mass x acceleration OR acceleration=force/mass
newton's 3rd law
for every action there is an equal and opposite reaction
force of gravity equation
Fg = M1 x M2 / distance (squared)
TIME IS SLOWER ON LAND, THAN ON AN AIRPLANE
TRUE
ASTROLOGY WAS USED FOR HARVESTING AND PLANTING
TRUE
LIGHT BENDS PRISMS BECAUSE IT CHANGES SPEED
TRUE
RADIATION
the transfer of energy by electromagnetic waves
CONDUCTION
the direct transfer of heat from one substance to another substance that it is touching
CONVECTION
the transfer of heat through a fluid (liquid or gas) caused by molecular motion
SEEING
The steadiness of the Earth's atmosphere as it affects the resolution that can be obtained in astronomical observations.
ACHROMAT
lens which transmits light without diffracting it
CHROMATIC ABERRATION
different colors do not focus at the same point due to lens bending different colors of light thru different angles
INERTIA
(physics) the tendency of a body to maintain is state of rest or uniform motion unless acted upon by an external force
RMIVUXG
radio, micro, infr,ultr, xray, gamma