2. Dark Energy: “The Anti-Gravity” Joseph C. Brossett

3. Consequences of Dark Matter Consider the ratio presented before: omega = actual density / critical density Consider the ratio presented before: omega = actual density / critical density If omega is < 1, we live in an open universe with constant expansion. If omega is < 1, we live in an open universe with constant expansion. If omega is > 1, we live in a closed universe that ends in a “big crunch.” If omega is > 1, we live in a closed universe that ends in a “big crunch.” If omega is = 1, we live in a flat universe that eventually becomes static. If omega is = 1, we live in a flat universe that eventually becomes static.

4. Explaining “Anti-Gravity” In contrast with dark matter, dark energy hopes to explain the motion of galaxies. In contrast with dark matter, dark energy hopes to explain the motion of galaxies. Galaxies, according to gravity, should move toward one another but do not. Galaxies, according to gravity, should move toward one another but do not. This effect is observed through contrasting red shifts with the brightness of supernovas. This effect is observed through contrasting red shifts with the brightness of supernovas. Dark energy is not necessarily energy in the conventional sense. Dark energy is not necessarily energy in the conventional sense.

8. Dark Energy Candidates Physicists ultimately do not know what causes the repulsion of galaxies. Physicists ultimately do not know what causes the repulsion of galaxies. One candidate is a cosmological constant corresponding to some “vacuum” energy. One candidate is a cosmological constant corresponding to some “vacuum” energy. Another is a proposed “quintessential” repulsive field pushing the galaxies apart. Another is a proposed “quintessential” repulsive field pushing the galaxies apart. In the end, plans to look at more distant supernovae will hopefully give better estimates. In the end, plans to look at more distant supernovae will hopefully give better estimates.

9. Summary Dark energy plays a large role in the ending fate of our universe. Dark energy plays a large role in the ending fate of our universe. Dark energy, unlike dark matter, is a phenomena to explain the motion between galaxies (“anti-gravity”). Dark energy, unlike dark matter, is a phenomena to explain the motion between galaxies (“anti-gravity”). Essentially, dark matter and dark energy dominate the universe on large scales. Essentially, dark matter and dark energy dominate the universe on large scales. Unfortunately, scientists really are not sure what dark energy is since it violates current laws. Unfortunately, scientists really are not sure what dark energy is since it violates current laws.