One of these things is not like the other...

DeepIron · 04-06-08, 05:58 PM

With apologies to Sesame Street...

http://news.bbc.co.uk/2/hi/science/nature/7333155.stm

How does finding two large planets orbiting a star half the size of Sol qualify as a "Solar System Look-alike"?

Quote:

Dr Dominik told BBC News: "We found a system with two planets that take the roles of Jupiter and Saturn in our Solar System. These two planets have a similar mass ratio and similar orbital radius and a similar orbital period.
"It looks like this may have formed in a similar way to our Solar System. And if this is the case, it looks like [our] Solar System cannot be unique in the Universe. There should be other similar systems out there which could host terrestrial planets."

Pure cr*p...

mrbeast · 04-06-08, 06:18 PM

Quote:

Originally Posted by DeepIron

With apologies to Sesame Street...

http://news.bbc.co.uk/2/hi/science/nature/7333155.stm

How does finding two large planets orbiting a star half the size of Sol qualify as a "Solar System Look-alike"?

Quote:

Dr Dominik told BBC News: "We found a system with two planets that take the roles of Jupiter and Saturn in our Solar System. These two planets have a similar mass ratio and similar orbital radius and a similar orbital period.
"It looks like this may have formed in a similar way to our Solar System. And if this is the case, it looks like [our] Solar System cannot be unique in the Universe. There should be other similar systems out there which could host terrestrial planets."

Pure cr*p...

Well I think the story is a little hyped. But I don't think Dr Dominik is suggesting that this system is a double for our solar system just that it shares some similar characteristics. Having two large gas giants in a similar orbital pattern to ours rather than near the star as in most other cases, simply suggests that our system may not be atypical. If our system is not atypical then it increases the possibility that earth like planets may exist elsewhere.

Dowly · 04-06-08, 06:46 PM

All I can see as "pure crap" in this is that he says:

"it looks like [our] Solar System cannot be unique in the Universe."

Umm... NO **** SHERLOCK!? There's trillions of solar systems out there, and we are supposed to be the "unique" one? Right...

DeepIron · 04-06-08, 08:02 PM

What I don't get is this: A star half the size of Sol, and in the same Main Sequence as Sol, cannot be more massive to allow these "gas giants" to orbit a roughly the same distance as Jupiter and Saturn do. If it were more massive, it would change the star's ability to maintain it's core temperature and that changes the radiant light and heat output accordingly. The only other explanation is that the gas giants are much lighter in their mass. The equation has to balance somewhere to achieve these orbits, more massive sun, or less massive planets.

So, what they "found" were a couple of large gas giants orbiting another star... When I read it in that context, it makes more sense than the "Solar System's 'look-alike' found" heading of the article.

People read this stuff without thinking about it, "Look Marge, they found another solar system just like ours!" Bah... I guess it's just a peeve of mine...

TteFAboB · 04-07-08, 10:05 AM

There's no free lunch Ironman.

"We have found ****" doesn't grant you more time and money.

3Jane · 04-07-08, 10:10 AM

Perhaps if you read it a little more closely.

DeepIron · 04-07-08, 10:27 AM

Quote:

Originally Posted by 3Jane

Perhaps if you read it a little more closely.

My complaint is not with the discovery, it's with the way the media headlines it.

And I have to agree, there's not much $$$ in saying "Hey, we found a couple of largish planets orbiting a star."

Not enough hype in it I guess...

04-06-08, 08:02 PM	#4
DeepIron Sea Lord Join Date: Aug 2007 Location: Too far from the Pacific right now... Posts: 1,634 Downloads: 0 Uploads: 0	What I don't get is this: A star half the size of Sol, and in the same Main Sequence as Sol, cannot be more massive to allow these "gas giants" to orbit a roughly the same distance as Jupiter and Saturn do. If it were more massive, it would change the star's ability to maintain it's core temperature and that changes the radiant light and heat output accordingly. The only other explanation is that the gas giants are much lighter in their mass. The equation has to balance somewhere to achieve these orbits, more massive sun, or less massive planets. So, what they "found" were a couple of large gas giants orbiting another star... When I read it in that context, it makes more sense than the "Solar System's 'look-alike' found" heading of the article. People read this stuff without thinking about it, "Look Marge, they found another solar system just like ours!" Bah... I guess it's just a peeve of mine... __________________ RFB / RSRDC Beta Tester RFB / RSRDC Modding Forum: http://forum.kickinbak.com/index.php RFB Top Post link: http://www.subsim.com/radioroom/showthread.php?t=125529 RFB Loadout: RFB_V1.52_102408: RFB_V1.52_Patch_111608: RSRDC_RFBv15_V396

04-07-08, 10:05 AM	#5
TteFAboB Admiral Join Date: Oct 2004 Posts: 2,247 Downloads: 4 Uploads: 0	There's no free lunch Ironman. "We have found ***" doesn't grant you more time and money. __________________ "Tout ce qui est exagéré est insignifiant."* ("All that is exaggerated is insignificant.") - Talleyrand

04-07-08, 10:10 AM	#6
3Jane Ace of the Deep Join Date: Sep 2006 Location: York. Northern England. Posts: 1,004 Downloads: 0 Uploads: 0	Perhaps if you read it a little more closely. __________________ Fate opposes me in vitality and morality, forced ever onward, burdened, always in shackles. So this very moment, without tarrying, pluck the quivering strings. Because fate punishes the one who plays, all lament with me. (http://hosted.filefront.com/KatherineRowan)

04-06-08, 06:46 PM	#3
Dowly Lucky Jack Join Date: Apr 2005 Location: Finland Posts: 25,052 Downloads: 32 Uploads: 0	All I can see as "pure crap" in this is that he says: "it looks like [our] Solar System cannot be unique in the Universe." Umm... NO **** SHERLOCK!? There's trillions of solar systems out there, and we are supposed to be the "unique" one? Right...