The axis is tilted 23.5 degrees with respect to the path of Earth's orbit around the Sun (the ecliptic). Mona Evans, "Teaching Why We Have Day & Night", http://www.bellaonline.com/articles/art23905.asp
Inflation is the mysterious force that blew up the scale of the infant universe from sub-microscopic to gargantuan in a fraction of a second. This theory posits that, when the universe grew exponentially in the first tiny fraction of a second after the Big Bang, some parts of space-time expanded more quickly than others.
Solar eclipses are one of the cosmic wonders of our solar system. They occur when the new moon blocks part or all of the sun as seen from the surface of the Earth. When the moon passes in front of sun, as viewed from Earth, the eclipse that occurs is visible from a narrow path on Earth that corresponds to the location of the moon's shadow. During a total solar eclipse, this path is known as the path of totality