Inaccuracy in reporting astronomy and science |
Inaccuracy in reporting astronomy and science |
Jul 12 2013, 04:56 PM
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#481
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Senior Member Group: Members Posts: 2082 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Given that they were testing this on Earth, in our gravity, atmosphere and ice composition, I don't doubt the engineers knew that it wouldn't be perfect; not that we know very much about Europan surface ice conditions in the first place.
And at those speeds, hitting anything (at 24,000 G!) is probably a lot like hitting granite . |
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Jul 12 2013, 09:16 PM
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#482
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Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
There's a Youtube video
showing a test (starting at 19:00) in sand a few years ago. The impact force in that test was 10,000 G. The force in the recent ice test was 24,000 G and in the talk about the sand test, the speaker mentions that the force of a Europa impact would be 50,000 G. If that is accurate, I guess they are closer than I thought to testing to the actual forces that would be seen. |
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Jul 13 2013, 07:22 PM
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#483
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Senior Member Group: Members Posts: 1582 Joined: 14-October 05 From: Vermont Member No.: 530 |
They can always just margin test here... not a total facsimile, but do something like fire it at much higher speeds than expected.
Hardness and brittleness aren't correlated, either. Granite might be both harder and stronger than what they expect. |
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Jul 13 2013, 09:40 PM
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#484
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Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
It seems to me that using what they expect the strength and hardness of Europa surface ice to be, a man-made facsimile could be made. It might be a resin mix of some sort for example. I wonder if something like limestone would provide a tougher (more accurate) test than ice.
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Jul 15 2013, 06:01 AM
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#485
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
Here's a really stoopid article inferring that NASA wants to build a theme park on the Moon
http://bit.ly/13jo6DJ |
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Aug 22 2013, 05:35 AM
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#486
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Member Group: Members Posts: 599 Joined: 26-August 05 Member No.: 476 |
Article on blue moon --
http://www.usatoday.com/story/news/nation/...ht-sky/2679903/ "Initially, the phrase referred to the third full moon in a month, ..." |
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Aug 27 2013, 06:01 PM
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#487
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Senior Member Group: Members Posts: 2082 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Have my own story this time; a few minutes ago CBC news showed this picture on TV, but had a caption saying that it commemorated the 'spacecraft's return' to Earth. For a second or two my jaw hung open; last time I checked, Cassini is exactly where it should be, and the only planet it's going to return to is Saturn itself in a couple of years!
I think the issue arose because of a misreading picture's caption, which says (emphasis mine) QUOTE That event on July 19, 2013, marked the day the Cassini spacecraft turned back toward Earth to take our picture as part of a larger mosaic of the Saturn system. Still, rather unexpected to see such a glaring blooper from this country's normally scientifically literate media... |
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Aug 27 2013, 11:10 PM
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#488
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
...this country's normally scientifically literate media...
Oh, that made me laugh the hardest. You can add Australia to that list!! |
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Nov 18 2013, 10:27 AM
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#489
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Member Group: Members Posts: 593 Joined: 20-April 05 Member No.: 279 |
The Sun's magnetic field is about to flip - and the Independent (a normally-ok UK newspaper) suggest this could cause:
Intergalactic weather fronts Oh my! Andy |
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Nov 19 2013, 05:36 PM
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#490
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Member Group: Members Posts: 495 Joined: 12-February 12 Member No.: 6336 |
Independent suggest this could cause Intergalactic weather fronts Intergalactic? Blimey! We better duck and cover then. I do wonder if such a magnetic reversal will cause any changes to the bubble around the sun? Still far short on anything intergalactic though. But the Voyagers might pick up something interesting perhaps. |
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Dec 12 2013, 02:16 AM
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#491
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Senior Member Group: Members Posts: 2082 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Just watched the Science channel ISON documentary. Accuracy report/review:
They way overestimate the nucleus size, but as the latest results are from the week after we can't blame them for that. Far worse is when they show the deep impact footage when explaining crater formation, but label it 'comet Halley'. At least they got Hartley right. A few misleading shots of asteroids and SDO Lovejoy pics, along with the usual reality TV cgi. No mention of amateur observation apart from about 10 seconds of the Russian discoverers. The image processing behind the Hubble images is probably a welcome addition for many on this forum, along with the sample harpoon testing (and the Comet Hopper/ Rosetta bits) too. |
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Dec 20 2013, 08:13 PM
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#492
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Solar System Cartographer Group: Members Posts: 10153 Joined: 5-April 05 From: Canada Member No.: 227 |
A big deal is being made - and rightly - about the beautiful Lunar Orbiter image of Earth above the lunar horizon - apparently a digital file of it was loaded onto LADEE. Except that it's being equated with the Apollo 8 Earthrise pic and referred to as 'the first Earthrise image' (http://spaceref.com/the-first-earthrise-im...o-the-moon.html)
Actually, the Lunar Orbiter image shows Earthset. Nit-picky, I know, but this IS the interrnet. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jan 2 2014, 09:42 PM
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#493
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Senior Member Group: Members Posts: 2082 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Winnipeg beats out Gale crater for low temperatures (briefly):
http://www.cbc.ca/news/canada/manitoba/win...lanet-1.2479967 Not exactly 'inaccuracy', but a bit of an odd comparison; night temperatures are a tad more insulated on Earth, hmm? |
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Jan 16 2014, 12:28 PM
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#494
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
Well this takes the cake. :wacko:Quotes a whole lot of UMSF member related blogs, tweets etc.
http://on.rt.com/sgkqhk |
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Jan 16 2014, 02:30 PM
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#495
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Is 0630 local after a bad night at work for me.
After just seeing that, is it REALLY too early to begin drinking heavily? -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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