originally posted by: GallopingFish
Im not pushing it or anything, I'm interested in other points of view. The dudes in the video are pretty serious..
Infact is anyone out there considering that maybe inside a star something is happening that we don't know about??
I sure as hell don't because I didn't go to middle school.
a reply to: Nyiah
originally posted by: youdidntseeme
But light is made up both of waves and particles (matter). This matter is known as photons...has mass too...
So when we are looking at light, we are looking at matter. So if there was no matter, there is no light either.
originally posted by: On7a7higher7plane
a reply to: darkbake
Yes in theory it seems 100% accurate that you wouldn't be able to identify the approximate location of the sun in a clean vacuum if you were faced in its' general direction but in space there is dust so the suns light will reflect off of the dust and color it. That means that the suns' apparent color will depend on what dust is in between you and the sun. Also space suits have a rounded glass visor with a tint so that could reflect enough rays to make its' approximate location visible as well.
Outer space has very low density and pressure, and is the closest physical approximation of a perfect vacuum. But no vacuum is truly perfect, not even in interstellar space, where there are still a few hydrogen atoms per cubic meter.
originally posted by: youdidntseeme
a reply to: On7a7higher7plane
A vacuum is defined as "space that is devoid of matter." Since light contains matter in the form of protons, once the light enters said vacuum, it is no longer a vacuum. The article also describes space as an 'imperfect vacuum.'
Since space is not a perfect vacuum, albiet the closest approximation we can see, those few hydrogen atoms per cubic meter are enough to make the suns light visible as well.
How do you explain the Bat signal then?
originally posted by: drneville
If you are looking into a flashlight, or the sun you don't actually see the sun or flashlight, just the light from those objects reflecting on your eye lens, so you don't see light sources in realtime... I guess that's what the youtuber meant.
originally posted by: Rob48
So if you had no eyes, you wouldn't be able to see? OK, that's one of the few things on this thread that makes sense
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
if I understand the concept it means you are referring to outer space as a vacuum and as such has no matter, therefore lightwaves have nothing to travel off of, therefore the lightwave has nothing to travel on to reach your eye.
Suppose outer space was a true vacuum (to which I don't believe and no phage I don't want to hear about it) and there were no particles at all in outer space. IMO if you looked at the sun you wouldn't see it.
You're right, where is he?
originally posted by: wildespace
This is gonna be GaryN's favourite thread.
Yes the first video started out making sense, when he inferred that light rays aren't seen as they pass through a vacuum or air, unless there's dust in the air, which is for the most part true. But then he went off the deep end when he said you can't see the sun from space, which I'm surprised nobody posted a picture contradicting that claim yet, but this disproves his claim:
He seems to be confusing seeing a sideways light beam with seeing light shining directly into your eye or camera. When you look at the Sun or any other source of light (in space or otherwise), photons enter your eye directly and you see light. It doesn't have to bounce off anything first. Apollo astronauts used stars for navigation on their way to the Moon.
If this is the standard of science knowledge of people who have (presumably) completed their education, I am seriously worried. In another 100 years we'll be back to living in caves!
originally posted by: Rosinitiate
a reply to: Rob48
For starters....get a grip. Most of what was taught in science to many has become old hat and most people don't bother to study up on space science thereafter and certainly nothing around them encourages them do so anyway.
If this is the type of behavior and attitude we can accept from "evolved" and "educated" humans, I am seriously worried. In another 100 years we will have assimilated ourselves from war and ignorance.