Invest 6/7
what is accretion?
A layer of gases that surround an object, held in place by gravity
what is atmosphere?
a dark area of a spectrum, indicating the wavelength of ABSORBED light
What is absorption line?
What is VISIBLE LIGHT?
a force of attraction between masses
what is GRAVITY?
an enormous collection of tens of millions to hundreds of billions of stars, interstellar, and gas
what is GALAXY?
a planet orbiting a star other then the Sun
what is an EXOPLANET?
a bright line of a spectrum, indicating the wavelength of EMITTED light
what is EMMISSION LINE?
How long it takes an object to orbit another object
What is ORBITAL PERIOD
the distance light travels in 1 year
What is a LIGHT-YEAR?
the average distance between an object and the object it is orbiting
what is ORBITAL RADIUS?
the sum total of all things that can be observed or detected
What is UNIVERSE?
a tool used to study the spectrum of colors coming from a light source
what is a SPECTROSCOPE
What is ORBITAL RADIUS
how many days are in a year?
what is 365 days?
the average distance between Earth and the Sun
What is an ASTRONOMICAL UNIT?
a region of space occupied by a system of objects orbiting a star
what is SOALR SYSTEM?
Every substance has its own specific one of these
what is LIGHT SIGNATURE
A mechanical device that shows the relative positions and motions of planets as they orbit the sun
what is ORREY?
How many moon phases are there?
A new geological epoch some scientists believe that we have entered due to human driven changes
what is ANTHROPOCENE?
a cloud of gas and dust between stars
a pattern of wavelengths that can identify different kinds of light
what is SPECTRUM
When one object appears to move across another object as seen from the perspective of the observer
what is TRANSIT
Name the systems on planet earth
What is hydrosphere, atmosphere, biosphere and geosphere?