Grade 9 Academic Science – Space
... Use your textbook to complete the sentences. NOTE: The phrases are not replicated from the textbook.
You may have to think about your answer. As well, words can be used more than one time.
... Very bright meteors
are known as fireballs.
A small number of
meteorites have been
shown to be of Lunar
(23 finds) or Martian
Study Guide_galaxies, Tools, and Stars Test
... 6. Name and describe the 3 types of galaxies.
7. Where is our solar system located in the Milky Way galaxy?
8. What is a light year?
9. What contains all the matter and energy that exists?
10. Name two types of optical telescopes.
11. What do radio telescopes receive and where do they come from?
15.4 Star Systems and Galaxies
... A. Star system-groups of two or more stars
1. Binary stars - two stars or double stars
a. Eclipsing binary-a system in which
one star blocks the light from another
II. Planets Around Other Stars
A. Astronomers study gravitational effects on stars to
see if there is a planet
III. Galaxies-classified ...
Ginger Dublin 6th Grade Science
... Starlight Brightness
• Apparent Magnitude: How bright a star
appears to be from earth when viewed with
the unaided eye. Distance can cause a
dimmer star to appear to be brighter than a
brighter star that is farther away.
• Absolute Magnitude: The amount of light
(brightness) a star actually has. Th ...
New Directions in Star Cluster Research
... Consequences of Definition of a Star
Stars must evolve (as they release
energy) - changes in structure and/or
Death of a star can occur in 2 ways
(a) Violation of first condition - self
gravity (breakup of star scattering
material into space)
(b) Violation second condition - in ...
... than low absolute magnitude
Unit 11 Guide: Concepts of Earth Science Stars, Galaxies, and the
... Milky Way galaxy?
2. What evidence do scientists use to support the Big Bang Theory? Explain the sequence of events
predicted by the Big Bang Theory.
3. Explain Hubble’s Law.
4. Compare and contrast the apparent and actual motion of stars. How can scientists know if a star or
galaxy is moving toward ...
Solar System and Astronomy puzzle 001
... 3rd rock from the sun
the distance that light travels in a vacuum in one Julian year
the four currently accepted dwarf planets beyond Neptune's orbit
nuclear reaction at core of star
a star system consisting of two stars orbiting around their
common center of mass
10. natural satellite
12. a massive ...
ASTRO REVIEW 14
... 10. Compare and contrast the geocentric and the heliocentric models of the
Physical properties of stars
... that are 1,000 times larger than our
sun. pg. 450
Surface temperatures range from 3000K
Color is an indication of temperature.
While the size of stars varies widely the
mass does not. 15 times our Sun’s mass
to .2 times our Su ...
Future of an expanding universe
Observations suggest that the expansion of the universe will continue forever. If so, the universe will cool as it expands, eventually becoming too cold to sustain life. For this reason, this future scenario is popularly called the Big Freeze.If dark energy—represented by the cosmological constant, a constant energy density filling space homogeneously, or scalar fields, such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space—accelerates the expansion of the universe, then the space between clusters of galaxies will grow at an increasing rate. Redshift will stretch ancient, incoming photons (even gamma rays) to undetectably long wavelengths and low energies. Stars are expected to form normally for 1012 to 1014 (1–100 trillion) years, but eventually the supply of gas needed for star formation will be exhausted. And as existing stars run out of fuel and cease to shine, the universe will slowly and inexorably grow darker, one star at a time. According to theories that predict proton decay, the stellar remnants left behind will disappear, leaving behind only black holes, which themselves eventually disappear as they emit Hawking radiation. Ultimately, if the universe reaches a state in which the temperature approaches a uniform value, no further work will be possible, resulting in a final heat death of the universe.