Shadows & Eclipses
What is penumbra?
The light part of a shadow, on the outside area of the umbra.
What phase is the moon during a solar eclipse?
New moon
What is the astronomical unit (AU)?
the distance from the Earth to the Sun (about 93 million miles)
What is gravity?
the force that pulls objects towards a center of mass
What is the longest river in the world?
Nile River
What is umbra?
the darkest part of the shadow, completely blocked from light
What phase is the moon during a lunar eclipse?
Full moon
Name the planets in our solar system.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
What is the relationship between mass and gravity?
larger mass means stronger gravitational pull
What does the "E" in email stand for?
Electronic
What is the corona?
the outside ring area of the Sun's atmosphere, seen as a fuzzy cloud during a total solar eclipse
What is a partial lunar eclipse?
when the moon is partially in Earth's umbra
What are terrestrial planets?
planets with solid, rocky surfaces: Mercury, Venus, Earth, Mars
What is the relationship between distance and gravity?
gravity gets weaker as distance increases
What is the smallest country in the world?
Vatican City
What is the path of totality?
the track or path of the moon's umbra across the Earth.
Why isn't there an eclipse every month?
The moon's orbit is tilted (5 degrees) so the shadows usually miss
What are jovian planets?
gas giants: Jupiter, Saturn, Uranus, Neptune
What is a galaxy?
a group of stars, gas, dust, and dark matter held together by gravity
What is the only letter that doesn't appear in any U.S. state name?
Q