Useful Astronomy

Just saw this story:

https://theconversation.com/what-is-below-earth-since-space-is-present-in-every-direction-245348

The answer was not really given. The author relied on explaining the ways to define the question - but did not follow through.

I am reframing in this video, which has me think through the parameters, which help define the final question - which I will now state:

TIMEFRAME going forward: The point in local time when the collision of the Milky Way with Andromeda changes the orbit of Sol within the Milky Way - 

OR

the point at which Terra is rendered uninhabitable through natural progression - rather something unexpected like a nuclear war or collision which ends all life.

WHICHEVER COMES FIRST.

SPATIAL BUBBLE: 

POSSIBLE ASSUMPTIONS - explain each

1. No travel at all - so radius of the bubble is the thickness of the galactic cloud from the point that is perpendicular to a plane at the center of the galaxy - but the bubble itself moves based on the current position of Sol. In other words, since we are not at the plane described above, some point outside the cloud will be within the bubble at certain times.

MOTION OPTIONS:

2a. Travel by plasma drive where the ejecta comes from some stored Uranium until the Uranium is gone - one way trip. Finesse the impossibilities and go with it. For this one, assume departure times after 2100. Assume acceleration to .5C, with travel at that velocity (no boost) until deceleration at the same rate until we hit something.

2b. Same assumptions, but assume 1G acceleration on each end of the trip with a .5C speed limit.

Question: Will travelers hit anything, ever, and if so what and when. Leave the end time indeterminate.

3. Instantaneous travel through either wormhole or astral means (assuming ascension starting at 3000 CE. Same end date with regard to collision with Andromeda.

PERCEPTION:

What exists inside that bubble from each of these POVs - both in terms of what will be seen with C being the limit AND what will actually be at each point of time if the old assumption on C (as being infinite) were used. Ignore objects outside the bubble's path.

DATA TARGETS:

What objects will be seen and/or be present for the entire period of the study and what events of note will happen during that time - particularly collisions with the solar system.

REWARD: I assume a Nobel Prize in Physics for publication of that model.