Topic 00 Flashcards
What is Earth?0.01
Planet
What is a star? Is the Sun a star?0.01
Has to have nuclear reactions in its core.
Yes.
Describe the order of the solar system in groups?0.01
Sun, 4 planets, the asteroid belt, 4 more planets, the Kuiper belt (w Pluto), more belts.
What is a galaxy?0.01
A large collection of stars
What is the name of our Galaxy? How many stars in that galaxy?0.01
The Milky Way had 400 billion stars.
What is the relationship between our solar system and the Milky Way?0.01
Our solar system is orbiting around the center of the MW Galaxy.
Describe the Hubble Ultra Deep field Image? 0.02
Taken by Hubble Space Telescope.
Shows thousands of galaxies.
11 days exposure over particularly dark region of the sky
Describe the pale blue dot Image? 0.02
Taken by Voyager 1 when it was near Pluto’s orbit. We do not have pictures of Earth from further.
What are the two most abundant elements in the Universe?
Hydrogen and Helium
What are the two most abundant elements in Earth’s atmosphere?
Nitrogen and Oxygen
What are the two most abundant elements in Earth’s crust?
Oxygen and Silicon
What are the Darker colored rocks richer in?
Iron and Magnesium
How does the moon look from the Southern Hemisphere compared to the North?
It looks upside down.
How many people walked on the moon?
12 ppl walked on the moon as a part of the Apollo missions (2+1 astronauts per mission)
Describe the composition of the lunar surface?
The composition of the lunar surface is similar to Earth’s crust
What are the lighter and darker surfaces called on the Moon?
Lighter: Highlands
Lowlands: Lowlands(Lunar Maria)
Image 1: The sun, ISS and Atlantis Shuttle?
The ISS orbits earth every 90 mins
Image 2: Solar Eclipse. What is required for it to happen.
Happens when Moon is between sun and Moon.
Angular size of the Moon and Sun is about 0.5 degrees.
Perfect alignment in the same plane is required for the eclipse to happen. This is rare because the plane of the orbit of the Moon is inclined approximately 5 degrees relative to Earth’s orbit around the sun.
