What counts as the start and end point of an EVA varies depending on what Agency is reporting it and who wrote the press release. The start can be anything from the start of decompression, reaching vacuum, opening the hatch or stepping outside, and the end stepping back in, closing the hatch, starting recompression or returning to atmospheric pressure in the airlock. In this case it's 5.5 hours outside, but there will have been more time spent inside but in vacuum at the start checking the suits are working properly (especially after the water leak last time) and at the end making sure there's no ammonia been brought back inside.

If you did the sums you'd land up with about 1.75 tonnes per cubic metre, or not quite twice as dense as water. Even less if they're colonial short measure tons.

C is for Corporation. It stopped being a Company at the end of 1926.

No, "programmer hours" versus "staff days". As everyone who has worked in a large organisation, public or private, knows it is vitally important to have numerous committee meetings and consult all stakeholders to make sure all possible solutions have been investigated and a clear approach decided before any programmers get involved.

Only if you let it. The Gravity Tractor idea usually uses two ion engines aimed so the exhaust goes either side of the body being towed. The tractor stays in place and there's no unwanted momentum transfer.

They're not sending out an SOS yet...

In the UK at least there are a lot of Grandads happily watch Thunderbirds with their grandsons, and thanks to some strong female characters quite a few Grandmas and granddaughters tutting about having to watch but enjoying it never the less.

There aren't that many 45 year old series still bear watching.

Cambridge still has the tow-away legislation in place just in case. Unfortunately when it was being used the last time it was so successful that it got too expensive to keep the trucks on standby.

Parking enforcement is dealt with at local level which is wh they have access in the first place.

Hmmm, let's think. A space plane fueled by liquid hydrogen. Very cold liquid hydrogen. And lots of it. I wonder what they could use to cool the incoming air?

One engine failure in four Falcon 9 launches, not two. The vehicle has done a test flight with a dummy payload, launched a proper Dragon for a two orbit mission, and now launched two Dragons to the ISS.

This could be very good. Joe Cornish appears in both Shaun of the Dead and Hot Fuzz (OK, in Shaun it's as "uncredited zombie") and seems to have much the same interests and outlook on life as Simon Pegg and Nick Frost.

I can see The Deliverators run being done as a Bond style pre-credits sequence and being awesome...

The second stages land up in orbit and slowly decay, and unlike previous flights there was no attempt to recover the first stage this time.

Actually, you *do* have to warn and the definition of "necessary" is quite tight. Login cookies are fine providing there has been a warning as the act of logging in then counts as informed consent.

And a less often publicised reason: It has proved very difficult to predict who is going to be throwing up once they reach orbit, but two days is almost always enough to get over it. An unmanned craft with fuel to spare could do first orbit docking, but if you've got a crew on board you probably don't want a vomit soaked control panel at the wrong moment.