Gliese 581D
What is this and does it have any danger to us?
Gliese 581D
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(account deleted)Hello Rory,
Could you tell us how you found out about Gliese 581D, and what your own researching of the subject has shown you?
Thanks.
"I was glad to be able to answer him promptly and with confidence. Without hesitation, I told him I didn't know." Mark Twain
In short, Gliese 581 d is a so called Super-Earth orbiting Gliese 581, something like 20 light years away, no danger to us at all.
It is a planet orbiting a star which is about 20 light years away. It is supposedly on the outskirts of the habitable zone, where liquid water may exist. As such it is interesting for the possibilities that life may exist there.
It is no danger to us. It is not "earthlike" as some have said, unless you consider 5.6 times the mass of earth to be 'earthlike'.
"Do you ever think about things you do think about?" - Henry Drummond to Matthew Harrison Brady in Inherit the Wind
Rory, look at it this way. Imagine that the Sun is the size of a basketball, located in Dallas, TX. Now imagine that the distance from the Earth to the Sun (1 Astronomical Unit, or 93 million miles) is 1 foot. The distance to Neptune would be about 30 ft, not even a city block.
Gliese 581 is 20 light years away. That is 120 trillion (with a T) miles. By doing a little math:
120,000,000,000 miles / 93,000,000 miles = 1,290,322.581 Astronomical Units (or feet for the purposes of our scale example)
1,290,322.581 feet / 5,280 feet (the distance in a mile) = 244.379 miles.
Therefore, Gliese 581 would be about the size of a shot put and located in San Antonio.
To travel this distance in a little over two years time, it would have to be moving at more than 40 times the speed of light, shown by Einstein's Theory of Special Relativity to be physically impossible.
Hope this gives you some perspective on the vast distances involved.
i was on youtube and there was this video where someone was talking about aliens and someone commented google Gliese 581D And i did and i found wikipedia its a short explanation on wiki but i didnt full understand it so i was hoping ye would
Could you help us by telling us what you think you did understand, and what what you didn't? A link to the video you saw might also be of interest to some of us, so they can be aware of what it claims.
"I was glad to be able to answer him promptly and with confidence. Without hesitation, I told him I didn't know." Mark Twain
no the video was a gaming video where the guy was talking about aliens not claiming anything he was just saying how what would u do if there was aliens and stuff i just didnt understand anything lol it was all about they think they can habit gliese 581D And they sent messages there and sorry for asking but why did u ask how i found out about it it seems like pretty big news
sorry for asking but why did u ask how i found out about it?
People here who might like to answer your questions would probably want to know what you saw about it, so they could confirm the accurate information, and correct any errors.
"I was glad to be able to answer him promptly and with confidence. Without hesitation, I told him I didn't know." Mark Twain
Rory, an extrasolar planet or exoplanet is simply a planet that resides outside of our solar system. Most of the ones we've discovered so far are huge (as big or bigger than Jupiter). Gliese 581d is an exoplanet around the star Gliese 581, about 20 light years (9,460,730,472,580.8 km) away. It is unique, because recent measurements (from about a year and a half ago) show that it might be able to support liquid water. We don't know if it harbors life, and right now we have no way to find out. Regardless, it is absolutely no danger to us. In fact, it is a very interesting discovery.
why did u ask how i found out about it it seems like pretty big news
I think Jim was just trying to get a handle on the claims (if any) that had you concerned, so he could be in a better position to address them.
Ok I don't understand how people do get scared when space agentecies find New planet out in there. What is the logic of it to be a danger to us. Please can some explain that to me. Why does everything have to be so scary we are not in the B.C. ages anymore. We are in 2010 A.C.
We're technically not in the B.C. ages anymore, either. Or "A.D." for that matter.
Keep your Jesus outta my calendars, yo! =P
That is true but hey this how we consider the time of ages. Let me rephrase this We are no longer in the Cave man ages ;O) is that better lol
For mixed audiences, I now tend to use BCE (before current era) instead of BC, and CE (current era) instead of A.D. However, I sometimes backslide into my old habits.
"I was glad to be able to answer him promptly and with confidence. Without hesitation, I told him I didn't know." Mark Twain
Why does everything have to be so scary
As David Morrison calls it: cosmophobia.
Jim, Astro or Juju: Have anyone of you heard that some astronomers have some doubts wether or not one of the planets orbiting the star even existed at all? I read in a newspaper here in Sweden that astronomers tried to "relocate" Gliese 581g, but couldn't find it. It just wasn't there. Here is an English version. I know that location and all those terms are vague when it comes to locating planets as far away as 20LY. Anyway, I'm not suggesting that this planet has disappeared, rather it seems as if astronomers that "found" Gliese 581g made some incorrect assumptions and found a planet that in fact wasn't there. Or what do you think about it? Was it this planet that were supposed to be similar to our own planet, or was that Gliese 581d?
Facts are stubborn things.
- Ronald Reagan
581 b, c, d and e are listed as confirmed extrasolar planets, planets orbiting another star. The two most recent additions to that solar system, 581 f and g (581 g being the interesting one in the habital zone, tidally locked etc etc), are listed as unconfirmed, where some using the same data cannot reproduce the same results that would indicate two more planets.
It might just be a slip in their data trying to double check and the planets are there, or it may be that these two recent finds are indeed not to be found at all. I think more time will be needed there, though I'm sure most would like to think they do exist. Best be sure and triple check it a few times.
581 g, if confirmed, would be the closest match to an Earth-like planet orbiting another star, in terms of size, relation to the habitable zone etc.
Hey Elliott since i can't do it in the Nibiru Nonsense Thread because it's locked to people who aren't members. But i watched your most recent video yesterday along with a couple others of yours and i liked them Good Work .
Cheers. More incentive to join wikidot for you there. Saves you typing Mike Poulin every time you post.
Oh, hey, there was a topic somewhere around here, let's get right back on it.
/forum/t-275408/gliese-581d#post-