Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
28 Cards in this Set
- Front
- Back
|
Science
|
The search for knowledge that can be used to explain or predict natural phenomena in a way that can be confirmed by rigorous observation/ experimentation.
|
|
|
Scientific Theory
|
A model of some aspect of nature that has been rigorously tested and has passed all tests to date
|
|
|
Astronomical Unit
|
150 million kilometers.
|
|
|
Light Year
|
The distance that light can travel in 1 year, 9.46 trillion km.
|
|
|
Parsec
|
Approximately equal to 3.26 light years, the distance to an object with a parallax angle of 1 arcsecond
|
|
|
SI meter
|
Distance light travels in 1/299792458 of a second
|
|
|
What is the distance a star must be for parallax to be 1 arc second?
|
1 parsec
|
|
|
Second
|
Duration of 9129631770 periods of radiation given off by hyperfine transition of cesium-133
|
|
|
Scientists want to find a replacement for the
|
kilogram
|
|
|
The kilogram is
|
a standard mass located in France =(
|
|
|
Our sun and stars of the local solar neighborhood orbit the center of the milky way galaxy every
|
230 million years
|
|
|
Parallax
|
The apparent shifting of an object against the background, due to viewing it form different positions
|
|
|
Constellation
|
A region of the sky
|
|
|
Celestial Sphere
|
Imaginary sphere on which objects in the sky appear to reside when observed from Earth
|
|
|
Celestial equator
|
The extension of Earth's equator onto the celestial sphere
|
|
|
ecliptic
|
The sun's apparent annual path among the constellations
|
|
|
horizon
|
Boundary that divides what we can see from what we cannot see
|
|
|
declination
|
Analogous to latitude, but on celestial sphere
|
|
|
right ascension
|
Analogous to longitude, but on the celestial sphere
|
|
|
circumpolar
|
Visible above the horizon
|
|
|
latitude
|
The angular north-south distance between the Earth's equator and a location on the Earth's surface
|
|
|
longitude
|
Angular east west distance between the primed meridian and a location on earth's surface
|
|
|
Summer Solstice
|
Refers both to the point on the clestial sphere where the ecliptic is farthest nort of the celestial equator and the moment in time when the Sun appears at that point each year
|
|
|
sidereal day
|
The time of 23 hrs 56 min 4.09 sec between successive appearances of any particular star on the meridian; essentially the true rotation period of earth
|
|
|
zenith
|
The point directly overhead, which has an altitude of 90 degrees
|
|
|
winter solstice
|
1. Point on celestial sphere where the ecliptic is farthest south of the celestial equator
2. Moment in time when Sun appears at that point each year |
|
|
vernal equinox
|
Spring Equinox
The point in Pisces on the celestial sphere where the ecliptic crosses the celestial equator |
|
|
autumnal equinox
|
The point in Virgo on the celestial sphere where the ecliptic crosses the celestial equator
|
