The hammer and the feather

The famous experiment of the hammer and the feather, made by the astronaut of Apollo XV, David Scott, concluding that Galileo had right.

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• astronaut
• galileo

[BryanBeatsYouAll]

this proves that they landed on the moon for real

[ErichoTTA]

Fascinating to see clips of people landing on the moon. Such a pity that in today's society and technology such achievements don't seem to have that much relevance anymore (as noted by Penn and Teller).

[blueshift314]

@YDDES all radiation is not harmful to us, at w/e intensity. for example, the frequencies of light that our skin re-radiates our is not harmful to as at all. It is only the frequencies that get absorbed that can potentially be harmful to us.

[tpcardoso]

@ny151151 why should their weight (i assume u meant mass) even matter? acceleration is constant regardless of the weight

[YDDES]

All "radiation" can be dangerous if it's intense enough, or if You stay in it long enough. Otherwise it isn't dangerous. Sunshine on the beach, as well as the x-rays at the dentist can kill You if You are subjected to it long enough. Otherwise You'll not be harmed. The same with the radiation in space.

The Apollo astronauts were not exposed to any dangerously intense radiation long enough to be harmed. Just as simple as that.

[zambi007i]

@nesokretep i take your point. let me get back with more info on fukushima fallout i'm currently studying on. thanx for sustaining the conversation.

[nesokretep]

- I am fully aware that radiation can cause such things as cancer and hemorrhages and genetic deformity and even instant death.

- That these things are in medical journals is not meaningful without other very specific information.

- As I said, all effects of radiation depend on two things: The kind and the intensity.

- Therefore without specific information about the kind and intensity of radiation in space, it is simply impossible to discuss the danger to the Apollo astronauts rationally.

[nesokretep]

- It is in fact not true that "everything that radiation 'permeates' becomes a secondary source of radiation."

- Only radiation of a certain kind and intensity can do that.

- The term "space radiation" does not refer to a specific kind of radiation.

- All radiation, including the various kinds without which you cannot live is "space radiation."

- You cannot conclude anything at all about the danger of radiation on the moon merely with the fact that radiation at Chernobyl was harmful.

[nesokretep]

@zambi007i -- I did not make any "personal judgements." I merely recommended that you learn more. My recommendation was based on (1) my assumption that you are the one who posted your previous comment and (2) the fact that your previous comment contained many errors.

[zambi007i]

sorry, not discussion, discussing!

[zambi007i]

@nesokretep (contd...) so please, please go through at least one such page before saying "not true" or "certain instances", etc. and i never referred to doubts about moon landing. i said radiation is deadly in the context of space radiation. aren't we discussion space radiation? i mean, who talked about infrared or microwave or even meter long radiation? and ultraviolet also kills the human body. that's why we've ozone here whereas our moon isn't so fortunate!

[zambi007i]

@nesokretep there you go again, sir, there you go again. i specifically said that personal judgments be left out but you couldn't care less. so, let me be straight to the point: the wiki radiation site is public domain but edited by scientists and reputed radiologists and doctors. other academic websites (can be googled) on radiation are authentic reading material. i say again that i've quoted only such sources and the statements are not mine. (contd...)