Section 1
What is the declination of the North Star?
+90
Which type of telescope uses glass lenses to collect and focus light______________?
Refracting Telescopes
A day on Saturn takes about 10 Earth hours. Which fact would best explain this short day?
Saturn rotates more rapidly than Earth
What are the Global warming Gasses?
Carbon Dioxide and Methane
A galaxy is
A collection of a large number of stars
Galileo discovered the following Moons of Jupiter______.
Io, Europa, Ganymede & Callisto
Where are you in the Milky Way Galaxy?
On the Orion Arm of the Galaxy, 2/3 of the way out from the center, 26,000 light years
What is a solar day?
A solar day is a Sidereal Day plus 4 minutes and it corresponds to the time it takes a given point on the surface of the Earth to point towards the sun after one rotational cycle.
Which is the best evidence for the Earth's rotation?
The rising of the Sun
The spinning of a body on its axis
is called
Rotation
Light travels at a speed of about 300,000 km per second or 186,000 miles per second. It takes about 8 minutes, 20 seconds for light from the Sun to reach the Earth. About how long would you expect sunlight to take to reach the Moon, as compared to the Earth?
about the same amount of time
When yellow dwarf's die, they explode in a ______________.
supernova
Two types of evidence for big bang theory include:
cosmic background radiation and red shift of galaxies
rotation of the sun and appearance of sunspots
red shift of galaxies and force of gravity
blue shift of galaxies and cosmic background radiation
cosmic background radiation and red shift of galaxies
Refractors use_____
Lenes
Which astronomer developed the three laws of planetary motion?
Kepler
The average distance between the Earth and the Sun is about_____?
1 astronomical unit.
Whose model of the solar system is Heliocentric and whose model is Geocentric?
Artisotle, Copernicus
Describe how the planets of the solar system formed?
Formed from a nebular cloud of dust and gas
Main layers of the earth____
Crust, mantle, outer core, and inner core
Seasones are caused by?
Earth's tilted axis
The shortest day of the year for an observer in the northern hemisphere is the_______.
The Winter Solstice
How do astronomers know that Mars experiences seasons similar to (but longer than) those on Earth?
The polar ice caps are seen to vary in size over time.
The length of an Earth day is determined by the time required for approximately one.
Earth rotation
When the moon is between the sun and Earth and casts a dark shadow on the Earth, what do we see?
Solar Eclipse
A lunar eclipse can only occur during which phase of the moon?
Full Moon