ALL OF IT Flashcards
How many GPS satellites are in orbit right now?
31
How many gps satellites are needed to pinpoint your location?
4
what is a important discovery for telescopes on 1773 and 1948
1773: Sir Nilliom Herbal discoverd Uranus
1948: a telescope so big that astromoners could ride in it
what is a Adaptive optic technology able to do and how?
Adaptive Optic technology prevents refracted light from interfering with telescopes by controlling the objective mirrior just enough to cancel out the refracted light
What is the trangulation method and how do you do it?
triangulation method is used to determine the distance of somthing by: making a baseline and making a angle at the end that reaches the object you wanna know the distance of. mirrior that to the other end and measure how far the distance is where the two angles meet.
what’s a astronomical unit?
The distance from the earth to the sun
What is a light year?
The time (a year) it takes for light to travel a distance
What is a Parsec?
A unit of distance equal to 3.26 light years.
What is the advantage of radio telescopes?
The ability to see more diverse wave lengths not visible to the human eye
How can astromoners see radio waves?
The give radio waves colours making kinda like a graph. The colours are given based of the strength of the wave.
What is the speed of light?
299,792,458 meters/s
What type of wave sends the highest frequency?
Gamma Rays
What type of wave sends the lowest frequency?
Radio Waves
What is Radio Inferometry?
It’s the process of connecting Multiple Radio Telescopes together digitally that are separated by distance, making the outcome Sharper and Clearer images.
What is VLBL
Is a method that combines many Radio Telescope, their signals are recorded with timing marks. These signals are put into a advanced computer making a huge and accurate photo.
what is a important discovery for telescopes on 400BC and 1926
400BC: A Greek Pythogorean propelled a wooden bird alonga wire using steam (the essential components of rocket flight)
1926: a man named Goddared achieved flight using a liquid fuled rocket.
what is a important discovery for telescopes on 1957 and 1962
1957: the Soviet Union launched “Sputnik 1” the worlds first artificial Satelite.
1962: John Glenn bacame the first person to rotate around earth
what is a important discovery for telescopes on 1969 and 1981
1969:The Apollo mission allowed the first man to walk on the moon
1981: The first mission of a space tranport system flew into space.
What is Gravitational escape velocity?
the velocity a thing needs to undergo to escape from a Gravitational centre (like earth) without having to under go further acceleration.
what is a ballistic missle?
a missle that is launched high into the air then letting gravity pull the missle towards I target.
what it gravitational assist
the use of something elses gravity to pull you away from a different gravitational centre you are trying to escape from.
What is a natural satellite?
a body that is made naturally and orbits a gravitational centre.
what is a artificial satellite?
a man made body that is launched into space to orbit a gravitational centre.
what are communication satellites used for?
to provide reliable and consistent communication regardless on placement on earth (your phone or a TV program)
what are oberservation and monitoring satellites used for?
these help monitor weather, carry out research, and help determine a ships location
what are GPS (GLOBAL POSTIONING SATELLLITES) used for?
These help us pin point our or something elses location. as well as giving us digital maps that are to scale.
