Space/Science « The HabitableZone

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Birthright Citizenship RobVG June 29, 2025 3:34 pm (CurrentEvents)

To be blunt, NASA is now dead RL June 27, 2025 11:56 am (Space/Science)

Just for the record... ER June 22, 2025 8:59 am (CurrentEvents)

NSIDC offline? ER June 12, 2025 12:19 pm (Space/Science)

Musk trashes his own AI after it chose a liberal worldview. RobVG June 23, 2025 9:56 am (CurrentEvents)

Psyche keeps its date with an asteroid BuckGalaxy June 22, 2025 5:21 pm (Space/Science)

The Three Unknowns After the U.S. Strike on Iran BuckGalaxy June 22, 2025 12:58 am (CurrentEvents)

There are only nine meals between mankind and anarchy. BuckGalaxy June 22, 2025 12:29 am (Flame)

"Remember, what the dormouse said, ER June 5, 2025 4:14 pm (Space/Science)

Not ready for prime time BuckGalaxy June 19, 2025 12:18 pm (Space/Science)

hypocrisy ER June 15, 2025 2:30 pm (Flame)

So, it is official RL June 6, 2025 5:39 pm (Space/Science)

Morning Mars pic by RobVG December 10, 2012 8:51 am

It looks like Texas. by ER 2012-12-10 08:52:54
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- LMAO! Thanks ER..I needed that. by Jody 2012-12-10 10:46:02
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Asteroid mining by TB December 7, 2012 2:29 pm

Something the earlier thread overlooked: Energy. by podrock 2012-12-07 15:50:24
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Mars; here we come. by johannes December 3, 2012 7:38 pm

A long way to go but I'm glad it's his mission by BuckGalaxy 2012-12-03 21:31:54
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- Apollo cost $100G in today's dollars. by ER 2012-12-04 11:14:48
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  - Colonization ain't gonna happen. by bowser 2012-12-04 16:37:27
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    - It's not impossible, just unprofitable. by ER 2012-12-04 19:06:09
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      - So what's wrong with constant resupply from a home base? by TB 2012-12-04 20:24:07
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        The tensions facing this Earth and species won't allow those expenditures. by bowser 2012-12-05 17:08:05
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        You need a reason to go there. by ER 2012-12-04 23:24:46
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        Good point. by TB 2012-12-05 10:29:31
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        There's a lot of stuff in space we need here. by ER 2012-12-05 13:13:39
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        Not the Moon. Asteroids. Avoid gravity wells when you can. by TB 2012-12-05 21:29:43
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        The Belt is good... by ER 2012-12-06 09:02:24
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        There are innovative entrepreneurs investing in this. by TB 2012-12-06 11:52:04
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        I wish them the best of luck. by ER 2012-12-06 16:48:55
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        "Belt to the inner solar system is just as energy-expensive–you have to slow down when you get home." by alcaray 2012-12-06 11:06:47
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        True, but aero braking by ER 2012-12-06 17:07:17
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        We used to think that sending probes to other planets required using rockets to achieve orbit. by alcaray 2012-12-06 17:50:27
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        Gravity assists require precise planetary alignments. by ER 2012-12-06 18:36:19
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        "don't occur all that frequently..." by alcaray 2012-12-06 23:08:15
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        Sails were a kind of warp drive. by ER 2012-12-07 06:09:17
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        My point by alcaray 2012-12-07 12:22:24
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        I'm not just trying to pick a fight and prove I must be right. by ER 2012-12-07 12:50:04
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Re: Space exploration. US can't afford a joint ESA-US Europa trip. Can spend $400 million each on F-22s. by bowser December 6, 2012 4:16 pm

Localized warming by RobVG December 4, 2012 9:36 am

Actually the basic concept is simple. by johannes 2012-12-04 21:01:25
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Do you ever wonder... by TB 2012-12-04 12:23:55
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You're right. We don't understand. by ER 2012-12-04 10:05:58
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- Nothing new, everything new. by bowser 2012-12-04 12:40:58
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- Very reasonable view. by TB 2012-12-04 11:26:27
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  - The S Hemisphere "anomaly" has already been explained. by ER 2012-12-04 12:11:18
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Looks as if the big Mars news was not what they found but what they thought they were going to find. by bowser December 3, 2012 12:54 pm

A word on the ramifications o the miscommunication. by alcaray 2012-12-03 17:33:56
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- Not to worry. by bowser 2012-12-03 19:22:27
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It depends on what part of the story you read. by johannes 2012-12-03 15:14:02
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What is chlorinated methane? Sounds like a "nerve gas precursor". by alcaray 2012-12-03 14:17:18
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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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