Space/Science « The HabitableZone

Why black holes don't suck. by ER November 27, 2012 7:01 pm

A 10 y/o plays football against the 49ers. by bowser 2012-11-30 13:52:58
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- That's relativity. by alcaray 2012-11-30 21:36:57
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Your argument is valid, except for the fact that by johannes 2012-11-28 11:27:55
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- Use or misuse of a word tells us nothing about what the word allegedly describes. by ER 2012-11-28 17:23:20
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  - Obsession about definitions? by johannes 2012-11-29 12:44:27
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    - Black Hole is a term coined by astronomers. by ER 2012-11-29 16:50:29
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      - You wrote that by johannes 2012-11-29 19:43:57
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        Newton was 99.99% right. by alcaray 2012-11-29 20:46:45
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        :) by TB 2012-11-29 20:07:48
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        It is interesting how an honest dialogue often turns towards the absurd. by johannes 2012-11-30 12:46:46
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        People saying absurd things will do that. by alcaray 2012-11-30 13:30:50
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        Tell me about it. by TB 2012-11-30 13:20:28
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- The galaxy is expanding? I don't think so. by alcaray 2012-11-28 12:31:25
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  - My reasoning is that by johannes 2012-11-28 14:21:40
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    - Objects that close are both red-shifted and blue-shifted... by alcaray 2012-11-28 23:43:45
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    - But stars and galaxies of stars were formed by gravity? Tthey formed by contraction. I by RobVG 2012-11-28 16:49:39
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      - Contraction, explosion, expansion. Perhaps. by johannes 2012-11-29 12:50:56
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    - Why not use your reasoning, instead, by ER 2012-11-28 16:28:26
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      - The concept of an experimental proof is very simple. by johannes 2012-11-29 12:41:53
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        No, Johannes. by ER 2012-11-29 13:10:59
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        Hmm, interesting by johannes 2012-11-29 15:00:27
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        Why make things so complicated? by alcaray 2012-11-29 16:51:36
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        The calculations? by johannes 2012-11-29 19:53:49
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        The calculations do not need to explain any theory to any layman. by alcaray 2012-11-29 20:49:47
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        You are assuming that it is the “mass” that causes the gravitational field. by johannes 2012-11-30 12:46:02
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        No I am not. by alcaray 2012-11-30 13:35:11
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        OK now that you read about it. by johannes 2012-11-30 20:39:06
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        I was hoping you would read about it. by alcaray 2012-11-30 21:11:50
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        I read it but did not get the an answer to my question. by johannes 2012-11-30 21:53:09
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        Your shields are impervious. I yield. by alcaray 2012-12-01 17:35:45
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        I KNOW!!!! johannes....you aren't even trying to see a different viewpoint. You are convinced you are right, and on that ... by Jody 2012-12-01 19:33:40
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        The shortest possible answer... by TB 2012-11-30 21:06:24
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        You have a good question. by johannes 2012-11-30 21:54:54
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        Correction by johannes 2012-11-29 15:01:21
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Well done, 4.0, except they do seem to suck, a lot, and blow, a little. by bowser 2012-11-27 23:21:11
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- That's true, but... by ER 2012-11-28 04:49:18
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Excellent, thanks n/t by RobVG 2012-11-27 21:34:58
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Why black holes still don't suck. by ER November 29, 2012 7:58 am

As with all conglomerations of matter, there is a center of gravity. by bowser 2012-11-30 01:55:03
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A 12kg projectile is fired by Jody November 27, 2012 6:29 pm

The shape would be a factor, too. by bowser 2012-11-29 00:30:48
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TA DA!!!!!!! You guys rock!!! by Jody 2012-11-28 17:31:42
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What mischief are you up to Jody. I hope this doesn't involve Texas secession. by FrankC 2012-11-27 23:11:46
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- LMAO!!! Frank...I'll save you! by Jody 2012-11-28 17:31:05
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On earth, at sea level, at the equator, fired towards the West, at a temperature of 80 degrees F, and 50% humidity? by alcaray 2012-11-27 22:21:50
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- It is strictly about the weight ratio! by Jody 2012-11-28 17:32:50
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You have two identical bullets ... by RobVG 2012-11-27 21:00:13
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- Anyone? Beuller? Beuller?... n/t by RobVG 2012-11-28 18:07:04
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  - They did it on mythbusters. by alcaray 2012-11-28 23:34:04
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12.5 Kilometers, 50 Kilometers by RobVG 2012-11-27 20:09:15
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- Houston, we have a problem. An order of magnitude problem. by ER 2012-11-27 20:36:13
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  - I see my mistake. by ER 2012-11-27 20:40:55
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    - Corrected, in metric, our results agree. by ER 2012-11-27 20:58:58
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    - I used a ballistic trajectory calculator :p n/t by RobVG 2012-11-27 20:53:17
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      - You got the right answer. by ER 2012-11-27 21:00:51
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        Thanks for showing your work. by RobVG 2012-11-27 21:04:12
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Moon Grazes Jupiter by ER November 28, 2012 8:50 pm

I noticed their proximity last night. by alcaray 2012-11-28 22:06:21
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Warp Drive breakthrough at NASA by BuckGalaxy November 28, 2012 12:01 pm

As soon as we figure out how to make a "negative vacuum energy ring" we will have it made. by alcaray 2012-11-28 12:40:39
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- Free enterprise can do it. by ER 2012-11-28 16:21:48
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Are there any educated guesses as to what Curiosity has found? by bowser November 22, 2012 9:15 pm

Looks like it was a misunderstanding by BuckGalaxy 2012-11-28 12:04:37
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Well, below I guessed... by alcaray 2012-11-23 01:31:56
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- No, I'm tuned in... by podrock 2012-11-23 20:37:45
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  - Now there's a rumor that HUMANOIDS have been found there by Lindy 2012-11-24 18:35:13
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    - That's not the SAME Obama, is it? by caspar 2012-11-26 17:34:10
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    - Lindy, that was Jimmy Hoffa, and all that's left is his DNA. by bowser 2012-11-24 22:10:40
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- I read those, and think they are great guesses. by bowser 2012-11-23 09:41:08
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  - Don't get your panties in a wad.... by Lindy 2012-11-23 17:27:28
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    - Magic crystals, no doubt. by alcaray 2012-11-23 20:20:04
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Nested Universe? by RobVG November 26, 2012 9:28 am

I'm going out on a limb. by bowser 2012-11-26 22:22:13
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More cooped than nested, I think. by alcaray 2012-11-26 18:45:44
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here's my deal... by FrankC 2012-11-26 14:17:29
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- If the mass goes to another dimension... by alcaray 2012-11-26 18:47:14
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  - By persistent I assume you mean we have never seen one of them stop functioning. by FrankC 2012-11-27 14:27:30
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    - Then your theory states that the mass hangs around inside the black hole for a while... by alcaray 2012-11-27 15:43:48
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      - Not necessarily by FrankC 2012-11-27 18:52:15
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        If the mass immediately goes there, then the mass immediately is not here. by alcaray 2012-11-27 19:40:45
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        So after a black hole is formed, what happens to the additional mass it consumes? by FrankC 2012-11-27 20:08:10
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        It's mass, demonstrably, is here. The effects of its mass are apparent. by alcaray 2012-11-27 22:17:49
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- Well, by RobVG 2012-11-26 15:05:44
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Well, this Universe has at least one boarder, me! by bowser 2012-11-26 13:07:33
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- Maybe the universe is finite and unbounded. by ER 2012-11-26 13:26:40
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  - If the inflationary model of the universe continues to hold... by alcaray 2012-11-26 18:57:29
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    - Even without inflation, by ER 2012-11-26 20:53:23
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      - You don't need to hold a picture of a hypersphere in your head. by alcaray 2012-11-26 21:14:52
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        Inflation and Expansion are not the same thing. by ER 2012-11-26 22:43:42
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        Inflation isn't that new (unless you are trying to brag on how old you are). by alcaray 2012-11-26 23:10:32
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        And now the expansion is accelerating by RobVG 2012-11-27 09:08:20
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        I don't know if its actually bragging... by ER 2012-11-27 06:12:26
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  - You are certainly correct, especially with "may". by bowser 2012-11-26 13:39:42
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    - I don't think there is an "outside". by ER 2012-11-26 18:26:45
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Habitable Zone Cited in Physics Forums! by ER November 25, 2012 8:04 pm

It would be more exciting if a novamaker was heading in our direction. by alcaray 2012-11-25 21:17:11
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- I think that was what Clarke had in mind. by ER 2012-11-26 06:04:33
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  - When I read it, it sounded like... by alcaray 2012-11-26 12:33:02
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Excellent! by podrock 2012-11-25 20:55:48
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Trouble in Aquila - a mystery solved? by ER February 19, 2007 10:23 am

Further evidence of a birefringent universe? by Bob Clark 2007-04-13 10:47:04
re: Trouble in Aquila - a mystery solved? by Robert Clark 2007-02-19 10:45:31
- re: Trouble in Aquila - a mystery solved? by ER 2007-02-19 10:57:54

"The time is with the month of winter solstice... by ER November 14, 2012 8:09 am

We had the same configuration of planets back in 1989 by Lindy 2012-11-23 18:11:57
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You sound like the kind that even has problems with astrology! by bowser 2012-11-14 08:15:17
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- I have no problems with astrolgy... by ER 2012-11-14 08:47:47
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  - Well, then, I'll bet you question homeopathy. You just sound like a doubter. by bowser 2012-11-14 09:16:45
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    - The placebo effect is very powerful and useful. If homeopathy does it for you then that's fine. by alcaray 2012-11-14 13:44:57
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      - As with astrology, Benny Hinn, Oral Roberts, acupuncture, etc. by bowser 2012-11-14 15:07:04
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    - I've got nothing against homeopaths. by ER 2012-11-14 09:22:02
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      - And my sign is Virgo. by ER 2012-11-14 09:50:58
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        That's it. The Virgin. by bowser 2012-11-14 15:08:26
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What is the Fundamentalist age of the Earth. by ER November 22, 2012 6:37 am

I agree. Too vulnerable to ridicule. Can't be defended Biblically. by bowser 2012-11-22 13:15:45
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Mast Cam by RobVG November 21, 2012 9:20 am

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