It

1
Its all relative!

• Astro notes
• Bause
• North Farmington High School

2
Newton and gravity

• Newton's laws of motion work very well for
  anything moving at much less than the speed of
  light
• His law of gravity works very well for any place
  of weak gravity such as in the solar system
• His laws fail when dealing with MASSIVE objects
  with VERY strong magnetic fields and with objects
  traveling a fraction of the speed of light or
  faster.
• Einstein developed Special Relativity and
  General Relativity, a revolutionary leap in our
  understanding of gravity and the nature of space
  and time.

3
Relative

• Einstein found that what you measure for length,
  time, and mass depends on your motion relative to
  a chosen frame of reference.
• HOWEVER, everything is in motion! The earth, our
  solar system, our galaxyetc. SO, space and time
  are RELATIVE to the frame of reference.

4
Special Relativity

• The passage of time on fast-moving objects is
  slower than if the object was at rest. ? the
  faster you go, the slower time goes by.
• HOWEVER, an observer inside a fast moving object
  would not FEEL as if time was going by slower.
  (its all RELATIVE)
• NOTHING can travel faster than the speed of
  light.
• Curved space time (recall Einsteins Dream
  video) and general relativity (more later)
• Matter can be converted into energy and energy
  can be converted into matter.
• E mc2

5
General Relativity
6
General Relativity 2
7
Evidence of warped space-time
This smudge
That smudge