Term
|
Definition
| device that makes distant objects seem closer |
|
|
Term
| electromagnetic radiation |
|
Definition
| energy that can move through space in the form of waves |
|
|
Term
|
Definition
|
|
Term
|
Definition
| the distance between the crest of one wave and the crest of the next wave |
|
|
Term
|
Definition
| the light spreads out to make a range of different colors with different wavelengths |
|
|
Term
|
Definition
| a telescope that uses lense or mirrors to collect and focus visible lights |
|
|
Term
|
Definition
| uses convex lenses to gather and focus light |
|
|
Term
|
Definition
| a piece of transparent glass curved so that the middle is thicker there edges |
|
|
Term
|
Definition
| uses a curved mirror to collect and focus light |
|
|
Term
|
Definition
| devices used to detect radio waves from objects in seace |
|
|
Term
|
Definition
| a building that contains one or more telescopes |
|
|
Term
|
Definition
imaginary patterns of stars
-formed pictures of people, objects, and animals |
|
|
Term
How do we classify stars?
|
|
Definition
we classify stars using:
color,
temperature,
size,
composition,
brightness |
|
|
Term
|
Definition
a device used by Astronomers, which breaks light into colors and produces an image of the resulting spectrum
most large telescopes have spectrographs |
|
|
Term
|
Definition
-depends on both the size and the temperature
-how far away it is from earth
Brightness can be described in 2 ways:
-Apparent brightness
-Absolute brightness |
|
|
Term
|
Definition
brightness that is seen from Earth
-doesn't tell us how much light a star really gives off! |
|
|
Term
|
Definition
the brightness the start would have if it were at a standard distance from Earth
-we figure this out by finding it's apparent brightness and the stars distance from Earth |
|
|
Term
|
Definition
the distance that light travels in one year
-measures the distance between the stars
-about 9.5 million million kilometers
-unit of distance, not time! |
|
|
Term
|
Definition
-used to measure the distance between nearby stars
-it is the apparent change in positiion of an object when you look at it from different places
-can use this to measure distances up to a few hundred light years from earth |
|
|
Term
Hertzsrung-Russell Diagram
(HR Diagram) |
|
Definition
it is a pattern used by Astronomers to classify stars and to understand how stars change over time.
-Ejnar Hertzsrung from Denmark and Henry Norris Russell from United States |
|
|
Term
Main Sequence
(HR Diagram) |
|
Definition
this is a diagonal area that includes more than 90 percent of all the stars
- surface temperature in this area increases as brightness increases |
|
|
Term
|
Definition
| a laarge cloud of gas and dust spread out in an immense voume |
|
|
Term
|
Definition
| a contracting cloud of gas and dust with enough mass to form a star |
|
|
Term
|
Definition
a blue-white core of the star that is left behind when it cools
after billlions of years, a white dwarf eventually stops glowing and becomes a black dwarf booo wooo :( |
|
|
Term
|
Definition
| when a super giant runs out of fuel, it explodes and in within hours the star blazes millions of times brighter |
|
|
Term
|
Definition
remains of a high-mass star
smaller and more dense than white dwarfs |
|
|
Term
|
Definition
| spinning neutron stars, short for pulsating radio sources |
|
|
Term
|
Definition
| an object with gravity so strong that nothing, not even light, can escape |
|
|
Term
See Diagram Given out in School of
Death of Stars
from Nebula to
1 White then to Black Dwarf
2 Neutron Star
3 Black hole
Dead Star, Dead Star, Dead Star... ends in one of these three above.. what determines its end?
Given out in class to study :>) |
|
Definition
|
|
Term
|
Definition
Our Star System only has ONE STAR...the SUN!
Most Stars are members of groups of 2 or more stars, called...the term above :>)
|
|
|
Term
|
Definition
Star Systems that have 2 stars or double stars
hint: bi means 2
Often one star is much brigher and more massive than the other with a dim companion star. Astonomers can tell even without seeing dim one as bright one wobbles and looks like dancing with and invisible dancer!! so they know the dancer must be there pulling bright star with its gravity! |
|
|
Term
|
Definition
Dancing star is not only clue!
Dim Star may pass in fron of bright start and make bright star look much dimmer (hint: think solar or lunar eclipse)
KEY: when one star periodically blocks the light from another is the definition of this term!!! |
|
|
Term
|
Definition
| Many Stars that belong to larger groupings |
|
|
Term
|
Definition
- loose, diorganized appearance
- contain no more than a few thousand stars
- oftencontain many bright supergiants and much gas and dust
gas * dust
* * * *
*
* |
|
|
Term
|
Definition
- LARGE groupings of older stars
- round (like shape of globe) and densely packed with stars
- contain more than a million stars
***
*****
***
|
|
|
Term
|
Definition
a huge group of sing stars, star systems, star clysters, dust and gas bound togeter by GRAVITY!!!
TYPES: Spiral, Elliptical, and Irregular |
|
|
Term
|
Definition
a bulge in the middle and arms that spiral outward like pinwheels
[image]
some are bar-shaped with a huge bar-shaped region of stars and gas that passes through the center
[image] |
|
|
Term
|
Definition
-
does NOT have spiral arms
-
looks like a round or flattened ball
-
contain billions of stars but have LITTLE gass and dust between stars
-
NO stars forming anymore....only OLD stars
|
|
|
Term
|
Definition
-
Do not have regular shapes..therrrr crazy!
-
SMALLER than other types of galazies
-
have many BRIGHT, YOUNG stars and LOTS of gas and dust to form new stars...wild!
[image] |
|
|
Term
|
Definition
- Very BRIGHT OBJECTS 10 billion light-years from Earth
- Looked like stars but not really.. kinda "QUASI" in Latin means 'something like' and thus the name it has
- they are active young galazies with giant black holes at the center with loads of gas around black hole that shines brightly
|
|
|
Term
|
Definition
-
Our Solar System is located in a spiral galazy called the Milky Way!!!
-
Can't see spiral shape of Milky Way because our solar system is inside the galaxy in one of the spiral arms!!!
-
Thought to be spiral, now evidence says Barred-spiral WOW my oh my
-
the center of our galaxy is 25,000 light years away from us
|
|
|
