What I think I know:(adsbygoogle = window.adsbygoogle || []).push({});

1. universe is expanding (from red shift observation?)

2. expansion is accelerating; farther galaxies move away at faster rate than nearer galaxies.

3. expansion rate will exceed speed of light

4. observable universe will be a lonely, dark place.

Question:

1. how can expansion rate exceed speed of light?

2. Is it the space that is expanding?

3. If space is indeed expanding, what is the process by which it does so? Is the space stretching? Or is "new" space being added in between existing "space"? or something other process? What experiment is used to detect/indicate/show that the expansion process is so?

4. Are there any significant consequences between "stretching" and "new" space in terms of what that understanding tells us about the workings of the universe?

5. Is gravity counteracting the expansion for nearby objects?

6. Do we expand? If the expansion of space stretches the wavelength of light, causing a redshift, then does the expansion of space stretch matter? That is to say you and I are a little larger than you and I from yesterday. If it is the case, how would be detect it, since 1 cm is today a little larger than 1 cm from yesterday.

That's all for now.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Accelerating, Expanding Universe Questions from a Novice

Loading...

Similar Threads for Accelerating Expanding Universe |
---|

I Expanding math space implies expanding space? |

I Questions About Acceleration and Jerk in Orbits |

B Anomalous accelerations in spacecraft flybys of the Earth |

I Moving through space vs sitting in an expanding space |

**Physics Forums | Science Articles, Homework Help, Discussion**