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;
24 Cards in this Set
- Front
- Back
|
Patterns of stars? |
Constellations |
|
|
Ancient cultures used ____ ____ or ____ ____ to name constellations. |
Mythological creatures Everyday items |
|
|
Some constellations are not visible because ___ __ __ |
Earth revolves around the sun |
|
|
Measure of the amount of light a star actually gives off |
Absolute Magnitude |
|
|
Measure of the amount of a star's light received on earth |
Apparent Magnitude |
|
|
The color of a star indicates ____ |
Temperature |
|
|
Hot stars are ____ ___ |
Blue white |
|
|
Cool stars are ___ ___ |
Orange red |
|
|
___ stars like the sun are ____ temperature |
Yellow Medium |
|
|
Hertzspring & russel? |
H-R Diagram |
|
|
Color of stars hottest to coldest |
Blue-blue white-white-yellow-orange-red |
|
|
Dark areas cooler than their surroundings |
Sunspot |
|
|
Sun is mostly ____ |
Average |
|
|
The sun is a ___ ___ star |
Middle aged |
|
|
The sun has a typical ___ ___ with ___ light |
Absolute magnitude Yellow |
|
|
It is unusual but the sun is a part of a ___ ___ ___ or cluster |
Mulitiple star system |
|
|
Classifying stars- Ejnar Hertspring and Henry Russel studied stars by ___ and ___ __ in a ___ __ |
Temperature Absolute Magnitude H-R diagram |
|
|
The mass of a tremendously big supernova core can collapse to a point, forming a ___ ___ |
Black hole |
|
|
Beyond a black holes ___ gravity operates as it would before the mass collapsed |
Horizon |
|
|
A ___ is so strong not even light can escape |
Black hole |
|
|
Gravity holds together a large collection of stars, gas, and dust is called a |
Galaxy |
|
|
Spiral arms wind out from inner section; some have barred spirals WITH stars and gas in a central baris called a |
Spiral galaxy |
|
|
Theories on the origin of the universe Universe has always wxsusted just as it is now? Universe expands and contracts repeatedly over time? |
Steady state theory Oscillating model |
|
|
The universe is always ____ |
Expanding |
