Show:
Telescopes
Characteristics of Stars
Lives of Stars
Star Systems and Galaxies
The Expanding Universe
100
What does the electromagnetic spectrum consist of?
ll the different types of electromagnetic waves
100
a light year is...
What is the distance light travels in a year.
100
Stars begin to form from a ball of gas and dust called a...
What is nebula.
100
What is the name of our galaxy, and what KIND of galaxy is it?
What is Milky Way, and it's a spiral galaxy.
100
The name of the theory for the formation of our universe.
What is big bang?
200
The type of light humans can see is called __________ light.
What is visible?
200
What color are the hottest and coolest stars?
What is blue-white, red.
200
The length of a star's life is determined by its _______.
What is mass.
200
A galaxy that doesn't have a regular shape is classified as a(n) _____________ galaxy.
What is irregular?
200
Our SOLAR SYSTEM (our sun and nine planets) formed from...
What is a giant cloud of gas and dust.
300
Telescopes work by collecting and focusing different forms of ___________________ radiation.
What is electromagnetic?
300
What do astronomers use to determine a star's chemical composition?
What is a spectrograph?
300
A supernova is the explosion of a dying ______________.
What is high-mass star.
300
How did scientists figure out/identify an eclipsing binary star system?
What is they become dimmer at regular intervals.
300
What will our universe continue to do in the future?
What is expand forever.
400
What is the force that tends to pull together the matter in stars?
What is gravity.
400
the absolute brightness of a star depends on...
What is its size and temperature.
400
The most massive stars collapse to form ____________________ when they die.
What is black holes.
400
What is a major difference between elliptical and spiral galaxies?
What is elliptical galaxies have almost no gas or dust, but a spiral has a lot of gas and dust. That is why a spiral galaxy has many YOUNG stars because they form from the nebulae.
400
What is Hubble's Law?
What is the farther away a galaxy is, the faster it is moving away from us. Duh!
500
Depending on its mass, a star may live from about how long to how long? (years)
What is 10 million to 200 billion years.
500
What is parallax, and why do scientists need to use it? For what purpose?
What is an object's change in position when viewed from two different places. It's used to determine a star's distance from Earth.
500
A star is born when...
What is nuclear fusion begins.
500
What is the astronomical name for the "Seven Sisters" star cluster?
What is Pleiades?
500
How long ago was the big bang?
What is billions of year ago?