Space Exploration 3 Flashcards
What is a refracting telescope?
Uses two lens
What is a reflecting telescope?
Uses two concave mirrors
Define Interfrometry
A combination of telescopes to obtain more detailed images
What kind of telescope is the Hubble Space Telescope
A reflecting telescope
Examples of electromagnetic energy
Radio waves, X-rays, infrared waves,
they all travel at the speed of light
Define wavelength
The distance between the crest or trough of one wave to the next
measured in µm
µm= 1 millionth of a meter
Define frequency
The number of waves per second
measured in Hz
Radio telescopes…
gather radio waves from distant stars, nebula, galaxies and planets
What is an array?
A group of telescopes used together
What is a space probe?
An unmanned satellite or remote control lander
Define triangulation
You can determine the distance to an object by measuring the angles between the baseline and the target object.
Define parallax
The apparent shift in position of an object when the object is viewed from two different places.
How can we determine the composition of stars
Each star emits light and that light is refracted to show distinct dark bands of light in the spectra
What tool is used to determine a stars composition
A Spectroscope
What is the Doppler affect?
Sound and light waves become compressed in front of a moving object and stretched behind it.
The pitch is higher as it moves closer and lower as it moves farther
