Re: 2nd question
If my crap maths is anything to go by, the answer is approximately 11.25km...
73km/sec/megaparsec is expansion rate
1 megaparsec is 3.08*10^19 km
1000 years = 3.16*10^10 seconds (with some rounding to 2dp)
Expansion = 73.3 km * 3.16E+10 seconds * (150,000,000 / 3.08E+19) megaparsecs
So, ignoring the fact that the earth and the sun are linked via gravity cos they're relatively close, and so this probably doesn't apply, this is saying that the distance between the earth and the sun (~147 million km) will increase by 11.25km over the period of 1000 years due to the universe expanding