Did Asteroid Impacts Spark Life's "Left-Handed" Molecules?: Scientific American:
"The mysterious bias of life on Earth toward molecules that skew one way and not the other could be due to how light shines in star- and planet-forming clouds, researchers say"
'via Blog this'
1 comment:
I didnt know how to put my quiz on like a regular post because im on my phone.
Quiz
1.What do halo stars tell us about our galaxy's history?
collisions between galaxies
2.How did our galaxy form?
large cloud of dust spiraling and contracting
3.What lies in the center of our galaxy?
black hole
4. What are the three major types of galaxies?
Spiral, elliptical and irregular
5. How are galaxies grouped together?
In spiral and elliptical clusters.
6. How do we measure the distances to galaxies?
measuring the light we see
7. What is Hubble's law?
H=v/d
8. How do distance measurements tell us the age of the universe?
how much the universe is expanding from a central point
9. Name a galaxy nearby.
Draco Dwarf
10. What is the mass of the black hole in the center of the galaxy?
4 million times the mass the sun
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