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Comment Re:I mean... (Score 1) 219

I think I more than doubled the useful life of my phone by being able to replace the battery easily but probably would not have benefited from waterproofing. I really think there is a market for both types of devices, even if some companies would prefer that one of those markets disappears.

Comment Dumb as bricks (Score 3, Insightful) 177

I have trouble understanding why MS even want to try to get back into the smartphone market at this stage, except wounded pride. Investors demanding growth, pissed that they have seen their stock stagnate compared to Apple?

They have failed utterly to execute on any strategy they had, they looked indecisive and uncommitted. It's such a huge bag of fail.

Comment So much armchair engineering (Score 1) 523

It was looked at and rejected in favour of high efficiency solar cells. At the time of the design of Philae (early-mod 90s?) there were no European designs for an RTG nor any expertise in building them. If the Philae consortium wanted an RTG they would:

- Source it through the US -- you couldn't exact buy them off the shelf and have all the attendant ITAR baggage that would go with it. Since it would practically work as a US contribution to Philae there would be some science exchange in return. Not impossible, but at that time was there any US money to fund a further contribution to Rosetta from the US on what was quite a high-risk project? Not clear... It also goes right against one of the core principles of ESA which is to invest in/support European technology development.

- ... or fund the development of a European RTG; high risk and probably prohibitively costly for the money available to support the mission and meet the mass budget available for Philae. No doubt that mature designs probably do not have a huge mass penalty, but a new design? Who knows, or would want to take the risk?

- There was at the time quite considerable political resistance in certain European countries to RTGs in space. IIRC Germany was one of them and this would have put a big obstacle in the way. Development of solar panel technology was and still is considered an important goal and improved solar cell technology would be an important spin off.

In the end it really does come down to politics; the safety issues could have been mitigated (at some cost), but there was no political will to go in the direction of RTGs. It will be interesting what will be selected for JUICE...

Incidentally Rosetta itself suffers to a certain extent from choosing solar panels - the long array is turning Rosetta into a windmill that is quite difficult to steer. RTGS would have allowed a smaller array.

Comment second picture (Score 4, Informative) 188

Rosetta solar panels at the top of the image, with the main body of the probe top right. The sun was causing lots of straylight in the image and it was quite saturated, so they had to do some major fix-up work to get anything sensible, hence the wierdness that you see on the left hand side.

Comment Re:Except it is not actually in space (Score 1) 21

Since ESA depends on it's member states for it's funding and the funding is given on the basis of the political objectives of the states, ESA it by it's nature a political one and always has been. But that does not exclude being a technical one as well, which is it, and quite deeply.

The "rich old white men" are in fact the european space industry, which ESA supports and promotes as one of it's primary functions.

Your ignorance appears boundless.

Comment Re:Total map size (Score 2) 77

Very little that Gaia observes is truly discarded -- just the main astrometric system needs a mix of stable, well behaved stars and very distant quasars, that could be between 10% and 50% of the objects detected. There will be an attempt to classify objects -- which you need to do in order to grab the quasars for the astrometric system

Comment Re:The real test... (Score 1) 77

Well, Gaia won't ever observe the Moon, nor Venus and Mercury which are always on the sun-ward side of the solar-shield. Jupiter is so bright that it really messes with the detectors when it transits the focal plane, but it should be possible to do some interesting general-relativity experiments with the light-bending effects of Jupiter's mass for stars that are close (not not too close) to Jupiter when Gaia observes near it.

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