1. Why do astronomers think that there may be other advanced civilizations? The Earth has only
been around for about 4.5 billion years, but the galaxy is more than 10 billion years old giving
the possibility of other civilizations older and more advanced
1. What is a nebula? How does it contribute to the birth of a star? A nebula is is a
cloud of dust and gas, composed primarily of hydrogen and helium. Gravity in the nebula
causes the gas and dust to clump together and as these clumps gather for mass by
How We Found Hundreds of Potential Earth-like Planets
1. What are some of the characteristics scientists are looking for when they search for other
Earth-like planets? Scientists look for planets about the size of Earth.
2. What technology are scientists
1. What is the concept of a universe? How is it different from a "multiverse"? A universe is all
there is and it contains all of the matter energy and time that has ever existed anywhere. A
Multiverse is different from that concept because it states that
Goldilocks and the Three Planets
1. Why is Venus not as suitable as Earth for human life? The dense atmosphere of Venus would
crush someone if they tried to stand on it and its massive amount of clouds have trapped all of
the sunlight available to it and
Phil Plait: How to Defend Earth from Asteroids
1. What happened on the "dinosaurs' bad day"? What was the effect of this? A chunk of
rock, six miles across, moving 50 times the speed of a rifle bullet slammed into the Earth.
It released its energy all at
1. What are black holes? A black hole is an object that is so compact
that its gravitational force is strong enough to prevent light or
anything else from escaping.
2. How do scientists look for black holes in space? Describe what a
black hole looks like
Journey Into The Sun
1. How are scientists studying the sun? They are using SDO, a spacecraft obtaining
IMAX-like images of the sun every second of the day, generating more data than any
NASA mission in history.
2. Why are solar storms a concern to Earth?