It works out to be 3 Ho^2 / 8 pi G (you need to square Ho and invert the fraction in your original equation; Ho is in units of inverse time, and G is in units of length cubed per mass per time squared, so G needs to be on top, divided by the Hubble constant squared to give you density).

At current estimates for the Hubble constant, that gives about 10^-29 g/cm^3, or about 5 hydrogen atoms per cubic meter.

:P thanks a lot, man =D>

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Non sunt multiplicanda entia praeter necessitatem.

Interesting article questioning Kuiper's role. It mentions Frederick C Leonard as first suggesting it, or something like it.

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- There must be a new moon out, she said. He's always bad then.

ops: Seems I've been undercharging you! I'll have to go to school on Planck's Law again.
If you build it, they will come...

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- There must be a new moon out, she said. He's always bad then.

CURRENT QUESTION



Quaoar...? It was the largest Solar System object to be discovered after Pluto?

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- There must be a new moon out, she said. He's always bad then.

=D> =D> =D>

Your go, Eroica!

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Non sunt multiplicanda entia praeter necessitatem.

Correct. You are the winner =D> [Next time I'll offer more hints for the late nighters (if such exist) :P ]

[I heard the audio of the astronauts conversation when they discovered these crystals. They were quite surprised to see such a large orange patch at a crater. This helped establish ancient vulanism on the moon]

Tang is also correct. =D> I wonder if it is still sold in grocery stores?

Eroica may have turned in early in order to catch The Impact later.

Therefore, here is another colorful question (if I may)....

Credit for the conservation of energy law could be given to this doctor. Who was he and what was the color problem that led him to be convinced of the conservation law?

Since this will be an open-Google exam....here is another bonus question. What happened to him in the end?

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

Well, that would be physicist/physician Julius Robert von Mayer (1814 - 1878). With the conservation law, he explained that in a hotter climate you have darker blood because you do not have to consume as much energy to maintain your body temperature (oxygenation, of course, makes the blood brighter).

He did not have much luck in the scientific community - lack of reputation, the death of two children etc. lead to a suicide attempt, followed by years of obscurity. He returned to a somewhat more public life around a decade later, but spent his last years in private, practicing his medicine.

Well, on that absolutely gurrreat achievement I can at least continue the game 8)

Bad one.... A wrinkle in someone who was mother to a lot of wet places, and it's named after some place where a cunning man once reigned - What is that, and where? \/

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Non sunt multiplicanda entia praeter necessitatem.

Thompson Crater (a "wrinkle") in the Mare ("mother to a lot of wet places") Ingenii (cleverness) on the Moon?

Psi-less

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"Given only the ships and right sails for the heavenly space, there will also be men unafraid of the terrible distances."--Kepler, to Galileo

Whow, I hadn't thought of that. Imaginative =D> , but no cigar - a mare is a wet place, not mother to it. Is a wrinkle round? What about the place where the cunning man reigned?

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Non sunt multiplicanda entia praeter necessitatem.

Hmmmm.... the Canyon on Venus?

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

No, but a "mare" (using one sense) is a female in several senses and the mother of a foal. A "Mare" in another sense can be used to describe not only the sea, but an arm of the sea, a creek, an inlet, a marsh or a fen (or "a lot of wet places"). And where else would a "cunning man reign" but in a place of cleverness? :wink:

(mumble...mumble...I bet I could find a round wrinkle somewhere....mumble...)

Psi-less

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"Given only the ships and right sails for the heavenly space, there will also be men unafraid of the terrible distances."--Kepler, to Galileo

I really was impressed, Psi-Less. After a couple hours, maybe he will grade with a curve and put you in the money.

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

Somehow I'm kind of doubting that, but thanks! Maybe someday they'll be a "prize" for the most convoluted thinking...

Psi-less

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"Given only the ships and right sails for the heavenly space, there will also be men unafraid of the terrible distances."--Kepler, to Galileo

Arneb, this is driving me nuts, because I am focused on the "mother of oceans," which there isn't one in Greek mythology, but Sedna is the Inuit Mother of Oceans. But a wrinkle on Sedna? Or do you mean Mother Nature? What kind of mother are you talking about?

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Sunset

Die Sonne scheidet hinter dem Gebirge. In alle Täler steigt der Abend nieder
mit seinen Schatten, die voll Kühlung sind.

Well, driving you nuts is the whole point, isn't it?
No, I did not mean Sedna (nice idea - but no one has yet benn able tor resolve anything on Sedna, it was one pixel even in a Hubble shot). No mother of Oceans for the Greeks- Yeah well, in a way, or not, or somehow. 8)

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Non sunt multiplicanda entia praeter necessitatem.

Nope (Venus was born in the sea, yes, but not mother to it).


Hint: The "mother" here is literal (as literal as these things go, anyway; we are not talking about "the mother of all"... wars/oceans/ coffee cups/ anti-wrinkle ointments etc).

Keep pushing! =D>

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Non sunt multiplicanda entia praeter necessitatem.

The mother is Tethys (mother of the Rivers in Greek mythology), Saturn's satellite. The cunning man was Odysseus, who lived in Ithaca (Ithaca Chasma on Tethys).

Question: What is the most distant star that is visible to the naked eye (ie V Mag 6.5 or brighter)?

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- There must be a new moon out, she said. He's always bad then.