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  1. N_LaRUE's Avatar
    This is, however, largely the fault of the scientific community for redefining a word to suit their purposes and then wondering why the rest of the world misunderstands them. A theory is a speculative position, nothing more. Not only does this sync with the etymological basis for the word, it also remains the common understanding. If only the scientific community had come up with their own word then this confusion would not exist.
    Are you sure which meaning came first? If so can you provide where you're getting this knowledge from?

    According to Dictionary.com which has a citation this is where the word origin is from and what it means.

    1590s, "conception, mental scheme," from Late Latin theoria (Jerome), from Greek theoria "contemplation, speculation, a looking at, things looked at," from theorein "to consider, speculate, look at," from theoros "spectator," from thea "a view" + horan "to see" (see warrant (n.)). Sense of "principles or methods of a science or art (rather than its practice)" is first recorded 1610s. That of "an explanation based on observation and reasoning" is from 1630s.

    Looking at this way you can see why science used it and why they didn't speculate that in the future people would turn it into a 'guess'.
    palandri, Laura Knotek and SpO BoB like this.
    02-12-2015 07:11 AM
  2. SpO BoB's Avatar
    Can any one tell me .. If it is possible to travel at the speed of light,and went some years.. will it be like time travel .. As the moving object has time =0 .. And if the speed exceeded the speed of light .. Would the person travels get younger .. "negative time" ???
    02-12-2015 09:11 AM
  3. N_LaRUE's Avatar
    Can any one tell me .. If it is possible to travel at the speed of light,and went some years.. will it be like time travel .. As the moving object has time =0 .. And if the speed exceeded the speed of light .. Would the person travels get younger .. "negative time" ???
    At this point in time, from what I remember there is no possibility to travel at the speed of light and it would not equate to time travel even if we could. FTL travel is a bit out there and wormholes are simply hypothetical currently. There were some recent experiments which claimed FTL particles but they have since been refuted.

    There are all sorts of ideas but the simple truth is we don't know enough about 'time' as such to predict if it's even possible. On top of that we don't know if time travel would only be forward or whether or not it's possible to go backward. The other question of course is, what is time?
    palandri, Laura Knotek and SpO BoB like this.
    02-12-2015 09:43 AM
  4. palandri's Avatar
    Saturn's moon Enceladus

    Enceladus is only 500 kilometers (310 miles) in diameter, but despite its petite size, it's one of the most scientifically compelling bodies in our solar system...

    Solar System Exploration: Planets: Saturn: Moons: Enceladus: Overview
    Attached Thumbnails saturnmoon.png  
    02-12-2015 06:28 PM
  5. palandri's Avatar
    From Mercury To Pluto: The Year Ahead In Planetary Exploration

    2015 is already shaping up to be a big year in astronomy and planetary exploration, with the best yet to come. Here are some highlights to keep your eye on throughout the year....

    From Mercury To Pluto: The Year Ahead In Planetary Exploration | IFLScience
    02-12-2015 06:31 PM
  6. fatclue_98's Avatar
    At this point in time, from what I remember there is no possibility to travel at the speed of light
    Frictional losses would preclude any chance at reaching 186k m/sec. Maybe in a vacuum?
    02-12-2015 06:32 PM
  7. palandri's Avatar
    International Space Station Expedition 45

    I can dig it!

    http://www.collectspace.com/news/new...n45-poster.htm
    Attached Thumbnails iss45.jpg  
    02-12-2015 07:01 PM
  8. palandri's Avatar
    12 Bizarre Facts About Jellyfish That Will Blow Your Mind

    12 Bizarre Facts About Jellyfish That Will Blow Your Mind
    02-12-2015 07:26 PM
  9. PepperdotNet's Avatar
    At this point in time, from what I remember there is no possibility to travel at the speed of light and it would not equate to time travel even if we could. FTL travel is a bit out there and wormholes are simply hypothetical currently. There were some recent experiments which claimed FTL particles but they have since been refuted.

    There are all sorts of ideas but the simple truth is we don't know enough about 'time' as such to predict if it's even possible. On top of that we don't know if time travel would only be forward or whether or not it's possible to go backward. The other question of course is, what is time?
    The laws of physics don't seem to hold up at those speeds. Suppose you are traveling close to lightspeed carrying a lantern. Some sort of discrepancy between the speed of light as perceived by you, vs. the speed of light as perceived by an observer who sees you. I can't remember the details, every time I've heard it explained it makes my brain hurt.
    palandri likes this.
    02-12-2015 11:07 PM
  10. SpO BoB's Avatar
    At this point in time, from what I remember there is no possibility to travel at the speed of light and it would not equate to time travel even if we could. FTL travel is a bit out there and wormholes are simply hypothetical currently. There were some recent experiments which claimed FTL particles but they have since been refuted.

    There are all sorts of ideas but the simple truth is we don't know enough about 'time' as such to predict if it's even possible. On top of that we don't know if time travel would only be forward or whether or not it's possible to go backward. The other question of course is, what is time?
    a good question ! i think this is relative to many factors ! i think that's because we have no equation can hold up with increase speed like this .. i'm thinking of the experiment in Large Hadron Collider can be used in some point since we already can observe speed of light moving atoms .. still i think any other moving object of that speed will be transformed into energy so that it is confusing !!
    palandri and Laura Knotek like this.
    02-13-2015 04:14 AM
  11. N_LaRUE's Avatar
    a good question ! i think this is relative to many factors ! i think that's because we have no equation can hold up with increase speed like this .. i'm thinking of the experiment in Large Hadron Collider can be used in some point since we already can observe speed of light moving atoms .. still i think any other moving object of that speed will be transformed into energy so that it is confusing !!
    Going by what I've read and some things I've seen on shows. Travelling at the speed of light is impossible for a 'normal object' but for your original question special relativity answers it a bit. However, whether you consider that 'time travel' is a different matter. Probably as close as we could get.

    Lastly the only 'real' time travel we have currently is looking into space. You can see the past there.

    Special relativity - Wikipedia, the free encyclopedia

    This also provide an interesting answer to your question - If it was possible to travel faster then the speed of light, would time reverse itself (like backwards time travel) or just not exist?
    palandri and Laura Knotek like this.
    02-13-2015 04:34 AM
  12. N_LaRUE's Avatar
    Frictional losses would preclude any chance at reaching 186k m/sec. Maybe in a vacuum?
    In a vacuum it would be possible, whether that is 'frictionless' is a different matter. Is space frictionless?

    Also, reading a touch, we can't travel a the speed of light because of E=mc2. This means that as you approach the speed of light the mass of an object increases. If you were to hit the speed of light the mass becomes finite, so in other words, you stand still, from what I understand.

    Yeah I'm trying to wrap my head around this tricky stuff. :P
    02-13-2015 04:44 AM
  13. palandri's Avatar
    I wonder how size and gravity fits in here. The larger an item is in space, the greater the gravity because you're stretching the fabric of space. Would that cause drag? If we find an earth that's the size of our sun, we wouldn't be able to land on it because the gravity would be 22X the gravity we have on earth and we would be crushed. Maybe stretching the fabric of space is the key to making a wormhole?
    N_LaRUE and Laura Knotek like this.
    02-13-2015 07:01 AM
  14. N_LaRUE's Avatar
    I wonder how size and gravity fits in here. The larger an item is in space, the greater the gravity because you're stretching the fabric of space. Would that cause drag? If we find an earth that's the size of our sun, we wouldn't be able to land on it because the gravity would be 22X the gravity we have on earth and we would be crushed. Maybe stretching the fabric of space is the key to making a wormhole?
    If you feel like getting a headache you could read this - Wormhole - Wikipedia, the free encyclopedia
    palandri and Laura Knotek like this.
    02-13-2015 07:29 AM
  15. worldspy99's Avatar
    Here is a good astronomy blog that I tend to read semi regularly.
    Bad Astronomy
    palandri and Laura Knotek like this.
    02-13-2015 09:19 AM
  16. palandri's Avatar
    Here is a good astronomy blog that I tend to read semi regularly.
    Bad Astronomy
    The first article in that blog talks about NASA’s Solar Dynamics Observatory. My wife and I went to Kitt Peak National Observatory in Arizona Kitt Peak National Observatory which has one of the largest solar telescopes. We went on the day tour and they bring you into a room with a really large round table and on the table is the sun. You can literally stand there for hours watching the sun. It's fascinating to watch. Then when you see a flare, all you hear are all the people going oooooooo, ahhhhhhhh.

    I went back for the night tour and was able to use a 20" telescope. Time flew by so quick, the next thing I knew the sun was rising.

    Something funny when you arrive at Kitt Peak, you start looking around and wonder where it is. Then you realize it's on top of the mountain that you're next to.
    02-13-2015 09:58 AM
  17. worldspy99's Avatar
    The first article in that blog talks about NASA’s Solar Dynamics Observatory. My wife and I went to Kitt Peak National Observatory in Arizona Kitt Peak National Observatory which has one of the largest solar telescopes. We went on the day tour and they bring you into a room with a really large round table and on the table is the sun. You can literally stand there for hours watching the sun. It's fascinating to watch. Then when you see a flare, all you hear are all the people going oooooooo, ahhhhhhhh.

    I went back for the night tour and was able to use a 20" telescope. Time flew by so quick, the next thing I knew the sun was rising.

    Something funny when you arrive at Kitt Peak, you start looking around and wonder where it is. Then you realize it's on top of the mountain that you're next to.
    I used to go see the Lowell Observatory in Flagstaff when I lived there. The claim to fame for that observatory is the discovery of Pluto:-)
    I have seen the solar flares on a similar setup that Lowell Observatory did in early 2000.

    Also we hiked to the top of Mt. Wilson in SoCal where we could see the observatory - Mount Wilson Observatory
    I am planning to take the kiddo there - no hiking of course since there is a road that goes up there as well.
    N_LaRUE, palandri and Laura Knotek like this.
    02-13-2015 10:29 AM
  18. palandri's Avatar
    Researchers call for interstellar messages to alien civilizations

    SAN JOSE, CALIFORNIA—Is it time to send deliberate messages to the stars, in the hopes of reaching alien civilizations? Advocates in the Search for Extraterrestrial Intelligence (SETI) say that moment is long overdue....

    Researchers call for interstellar messages to alien civilizations | Science/AAAS | News
    Guytronic and Laura Knotek like this.
    02-13-2015 05:58 PM
  19. palandri's Avatar
    Icebergs are white, correct? Maybe not if they flip.

    Flipped, Dirty, Amazing Icebergs : Earth Matters : Blogs
    Guytronic and Laura Knotek like this.
    02-13-2015 06:04 PM
  20. palandri's Avatar
    Hubble photo of galaxy NGC 7714 being pulled like taffy by galaxy NGC 7715

    This is a very impressive photo!

    HubbleSite - NewsCenter - Hubble Spies a Loopy Galaxy (01/29/2015) - Release Images
    Guytronic and Laura Knotek like this.
    02-13-2015 06:11 PM
  21. Guytronic's Avatar
    SAN JOSE, CALIFORNIA—Is it time to send deliberate messages to the stars, in the hopes of reaching alien civilizations? Advocates in the Search for Extraterrestrial Intelligence (SETI) say that moment is long overdue....
    Might as well.
    We ain't makin' a whole lot of progress talking to each other here
    palandri, Laura Knotek and N_LaRUE like this.
    02-13-2015 06:53 PM
  22. palandri's Avatar
    .....
    Attached Thumbnails electron.jpg  
    02-13-2015 11:13 PM
  23. palandri's Avatar
    Love in the Time of Science

    From evolutionary psychology to microbiology, this Valentine's Day discover what scientists are learning about the rules of attraction

    Love in the Time of Science - Scientific American
    Attached Thumbnails heartvalentine.jpg  
    Guytronic likes this.
    02-14-2015 05:50 AM
  24. palandri's Avatar
    Sweet Science: Study Discovers How Many Licks It Takes to Reach the Center of a Tootsie Pop

    Mathematicians Discover Licks it Takes to Reach Center of Tootsie Pop
    Guytronic and Laura Knotek like this.
    02-14-2015 06:09 AM
  25. palandri's Avatar
    Neil deGrasse Tyson answering 'Do you think time travel will ever be possible?'

    Guytronic and Laura Knotek like this.
    02-14-2015 02:43 PM
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