SPACE Flashcards
What are constellation?
a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure
What are Celestials bodys?
objects in space such as the sun, moon, planets, and stars.
What is a frame of reference?
a set of criteria or stated values in relation to which measurements or judgments can be made.
What is azimuth?
the direction of a celestial object from the observer, expressed as the angular distance from the north or south point of the horizon to the point at which a vertical circle passing through the object intersects the horizon.
What is Altitude?
height of an object or point in relation to sea level or ground level.
What is an astrolabe?
an instrument formerly used to make astronomical measurements,
What is a compass?
an instrument containing a magnetized pointer which shows the direction of magnetic north and bearings from it.
What is Geocentric?
having or representing the earth as the center, as in former astronomical systems.
What is a sun centered model?
a cosmological model in which the Sun is assumed to lie at or near a central point
Who invented the telescope?
Galileo Galilei
Whats the difference between refracting and reflecting?
Reflection is the act of light reflecting back when it hits a medium on a plane. Refraction is the process by which light shifts its path as it travels through a material, causing the light to bend.
What is universal gravitation?
every particle in the universe attracts every other particle with a force directly proportional to the product of their masses and inversely proportional to the square of their distance.
What is a spectroscope?
breaks the light from a single material into its component colors the way a prism splits white light into a rainbow
What is diffraction grating?
a plate of glass or metal ruled with very close parallel lines, producing a spectrum by diffraction and interference of light.
What is a spectral analysis?
the determination of the constitution or condition of bodies and substances by means of the spectra they produce
What is the doppler effect?
an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other.
What is triangulation?
a method of measuring distance indirectly by creating an imaginary triangle between an observer and an object whose distance is to be estimated
What are adaptive optics?
allows the corrected optical system to observe finer details of much fainter astronomical objects than is otherwise possible from the ground
What is the parallax technique?
the displacement or change in the object’s apparent position when viewed from two different points of view.
What are astronomical units?
a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.
What are electromagnetic radiation?
a kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously.
What does CCD mean?
Charge
Coupled
Devices
What is artificial satellite?
an object that people have made and launched into orbit using rockets.
What does GPS mean?
an accurate worldwide navigational and surveying facility based on the reception of signals from an array of orbiting satellites.
