Follow Slashdot stories on Twitter

 



Forgot your password?
typodupeerror
Check out the new SourceForge HTML5 internet speed test! No Flash necessary and runs on all devices. ×

Comment Re:Wow (Score 1) 179

That's not what people were complaining about in the video. What people were complaining about was that they were landing right next to an exposed, filled propellant stage. You don't land a skyscraper-sized fireball-on-a-stick right next to a half billion dollar tank of fuel. That aspect was clearly stylized.

Comment Re:couldn't coexist with their English neighbors (Score 1) 179

I know you're joking, but modern day colonists could haul a billion Bibles and not add any weight, thanks to modern storage. They also wouldn't need a printing press, for the same reason. OTOH, the printing press was used to jack the timbers and save the ship, so maybe they should have a lightweight jack on board, just in case. :)

Comment Re:Star of David used by Neo Nazis... (Score 1) 182

My position is that anyone can have any opinion they want, and that the significance of that opinion to others depends on whatever level of trust the claimer can command. This puts some people in a de facto privileged position. This can be rational (e.g. privileging an oncologist's opinions on cancer over a layman's) and in other cases not (privileging a fellow mom's opinions about vaccines over an immunologist or toxicologist).

So my point is that you CAN make any of the claims you suggested, but your authority won't carry much weight because you're just a random bloke on the Internet. You would have to make a convincing argument. However even then there are lots of very credible-sounding arguments out there that don't sound credible to someone who has actual knowledge.

The bottom line is knowing the truth of any claim is quite difficult, particularly when it involves jargon. In general the judgment of someone who has spent some time studying an issue is more be trusted than what "stands to reason" in your own judgment. Even so, an expert should still be able to give a coherent defense of his positions.

So in the case of this frog meme, I have no particular reason to doubt ADL; however if it were important to me I would look at the evidence ADL puts forward in justification of their position. I do not necessarily agree with ADL on everything (e.g. on Muslims displaying tokens bearing the Shahada), but they have more than any other group tracked violent extremist groups and their affiliates and therefore are in at least a position to compare and contrast the symbols used. If, however, it were an organization like Kahane Chai, I would feel no particular reason to look into their reasoning because they're a racist group. Life is simply to short to treat a source that is consistently nonsense as if it might be credible.

Comment Re:Star of David used by Neo Nazis... (Score 1) 182

Well, actually technically speaking you're the one begging the question: you haven't established that either you or I enjoy some kind of privileged position in which we get to condemn other people for condemning language they don't like.

So by all means condemn them for calling things "hate speech", it's your right; but it's also their right.

Comment Re: Impressive spec (Score 1) 111

Well would you look at that indeed! I argued for a loss of 348-282=66 sec in Merlin, and said that Raptor would be somewhat less of a difference but not much, as "chamber pressure has a positive but fairly weak correlation with ISP". You said 384 - "360-370" = 14-24 sec difference.

And the reality is... drumroll... the envelope please...

384-334 = 50 sec

I hope this has been a learning experience for you.

Comment Re:Wat (Score 2) 90

This is not correct. Juno is planned to do some limited observation/a> of the Galilean moons. It's a side mission, not central to it's focus (and Juno is anything but optimized for it), but it's one of those cases where, if you're there and you have the hardware...

Concerning Europa (remember that this was before the recent news):

The most significant opportunity for Juno to do Europa science would be to follow up on the plumes possibly detected by Hubble Space Telescope. Confirming Hubble's detection would be very scientifically valuable. Any information on the source location would be valuable. This science goal just may not be possible with the large distances from Juno to Europa, but we will look.

JunoCam or ASC can only detect plumes if they contain fine particles. The Hubble discovery (if real) only shows the presence of water vapor. We can predict by analogy to Enceladus that water vapor plumes will also contain particles. However, it is important to remember that the Hubble discovery was of gas, not particles. If the putative Europa plumes are Enceladus-like and do contain particles, they would not be as tall as Enceladus', because of Europa's higher gravity. Scaling for Europa’s gravity gives a maximum plume height of under 140 kilometers. To detect plumes, we need at least two pixels, so the image spatial scale would need to be better than 70 kilometers, at a relatively high phase angle where the particles would forward-scatter light to JunoCam and ASC.

To achieve resolutions better than 70 kilometers per pixel, UVS needs to be within 40,000 kilometers of Europa; JunoCam, 100,000 kilometers; and ASC, 170,000 kilometers. For the cameras, given the low expected height of the plumes, there is not much flexibility.

There are just four orbits that have Europa flybys that are closer than 300,000 km. Juno reaches the best available geometry in September 2017 as the rotation of the line of apsides brings Juno’s orbit close to Europa’s orbit:

2017-03-08 253,118 km
2017-09-19 264,043 km
2017-10-03 92,267 km
2017-10-17 204,654 km

Slashdot Top Deals

One way to make your old car run better is to look up the price of a new model.

Working...