Foundation of Astronomy
Telescopes gather ___________, which is how we know celestial objects exist.
1000 kg is written in scientific notation as ______
1.0 x 103 kg
One 360 degree spin of any object, that which for Earth takes approximately one day (24 hours) is known as _______________
What is a rotation?
It takes this long for the Moon to revolve around the Earth
What is approximately a month? (29.5 days)
This is a theory that proposes the Earth to be at the center of the Universe
What is geocentric cosmogony?
The kind of galaxy the Milky Way is _____________
What is a Spiral galaxy
One of these units represents the average distance between the Sun and Earth.
What is an Astronomical Unit? (AU)
0.0006 m can be rewritten as __________
6.0 x 10-4 m
Name one Ancient Civilization that utilized the Earth's movements to devise a Calendar system.
What is Egyptians, Mayans, Sumerians or Aztecs?
Another word for solar noon
What is a Meridian
This is one of Kepler's Laws of planetary motion, stating that the orbit of a planet around the Sun is an ellipse with the Sun at one focus
What is Kepler's first law?
The composition of every galaxy (what they are made of) includes: ________________
Gas, dust and stars
A collection of ideas that explain a phenomena in a way that is consistent with laws, observations and experiments.
What is a scientific theory?
Rewrite 8000 millimeters in meters
8 meters
When the Sun is high in the sky during the day, the number of daylight hours is greater. This season is __________
What is Summer?
Name one of the only two phases of the moon when eclipses can occur
What is a New or Full moon?
The size of the orbit determines the orbital period, not the mass (smaller orbit= less time orbiting, vice versa)
The location of our solar system from the center of our galaxy is approximately ________________
25,000 lightyears away from the center
The next level of space outside our galaxy, the Milky Way is called ____________.
What is a Local Galactic Group?
Which amount of mass is largest?
A) 1 gram
B) 2 milligrams
C) 3 nanograms
1 gram
The angle at which the Earth is tilted at on its axis of rotation that causes the seasons in different parts of the world is _____________
The moon phase immediately after the Full moon is _____________
Would Jupiter move faster than the Earth if it was orbiting the Sun on the same orbital plane? Explain
No because according to Kepler's third law, the orbit size is what determines orbital period, not the mass of the object.
What is the evidence that the Universe is constantly expanding?
Redshift of the galaxies light
Name 3 elements humans have in common with stars.
What is oxygen, carbon, hydrogen, nitrogen, calcium, phosphorus, potassium, sulphur, sodium, chlorine or magnesium?
The mean radius of the Earth is 6,000,000 meters, express this value in centimeters using scientific notation.
6.0 x 108 cm
It is August and the sun is high in the sky, with long daylight hours. In 6 months, it is expected to be of similar temperature and very little change in weather. Where are you located on the Earth?
What is the equator?
It is June 21st in the Southern Hemisphere, the position of the Sun on an observers Zenith for the upcoming few days will be slightly _____________
What is higher?
The eccentricity of Planet X is about 0.5, how will its orbital speed be affected when it is furthest from the star it is orbiting according to Kepler's second Law?
Planets move slower when they are far from the star
Name the three essential parts of a galaxy
1. The bulge
2. The disk
3. The halo