1) > Earth? Yes.
2) Fermions? Yes.
3) N eb u lar? Yes.
4) > 5777K object? No
5) Radial velocity blueshift? Nope.
6) Milky Wayan(s)? Yes.
7) Opticality? Yes, "more blue" means the visual color blue.
8) > 24 hour period? Not likely. [Oops, likely. ]
9) Atmosphere? No.
10) Delta T color change? No.
11) Gas giant planet related? Hmmmm... I'll say no, but...
12) Spherical? No.
13) Star forming [region]? Yes
14) In galactic arm? More likely than not.
15) Herbig-Haro Object connectivity? No, it is not a HH object. Yes, there is a connection.
16) Variable reflection nebula of an HH object? Probably not, but...
17) Orion object? Possibly.
18) Herbig AeBe object? YES INDEED!
19) Rayleigh Scattering? Yes, that is the answer to the blue appearance but not the answer to why it is periodic.
20) Periodicity caused by protoplanetary tansits? BINGO!

From Wiki:

Sometimes Herbig Ae/Be stars show significant brightness variability. They are believed to be due to clumps (protoplanets and planetesimals) in the circumstellar disk. In the lowest brightness stage the radiation from the star becomes bluer and linearly polarized (when the clump obscures direct star light, scattered from disk light relatively increases - it is the same effect as the blue color of our sky).

Unfortunately, even their reference is no longer active on the web. It is a curiosity since the "clumps", I assume, would need to be significant in size. Since the majority of these disks would have some inclination, it seems logical that we would observe the Rayeligh scattering.

I hope others will also try the 20 question approach and not let this clumsy nascent effort be a inhibitor. Perhaps we should allow the quizer to give one erroneous answer. [How's that for rationalization? ]

CONGRATS EROICA!!

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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.

Yes, that was a nice one to watch. I was unable to participate, but it was fun reading.

Nice graphics, too, George.

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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.

OK.

Twenty Questions:
What celestial object am I thinking of?

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is it gaseous?

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is it more massive than our sun?

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"I will do my best to understand and explain the universe from big to small without invoking miracles, unrepeatable events, or divine intervention. In place of those things I will use observations, mathematics, and science."


-Cross
My travel blog

Some of my Astrophotography


Those that lack education have a hard time understanding its value. - Cross

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Is it bigger than a bread box 1 cu lyr in vol.?

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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.

I have no idea what this means!

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is it bigger than a bread box - supposing that the the bread box were 1 cubic light year in volume?

__________________
"I will do my best to understand and explain the universe from big to small without invoking miracles, unrepeatable events, or divine intervention. In place of those things I will use observations, mathematics, and science."


-Cross
My travel blog

Some of my Astrophotography


Those that lack education have a hard time understanding its value. - Cross

The traditonal first guess in 20 questions is the size question of... "Is it bigger than a bread box?". [I think Dave jokingly raised it in the last go-round.] Boxes that house a loaf of bread are not as common as they used to be, admittedly, but it is a good middle ground question that eliminates a lot of possibilites. An astronomical equivalent is probably a large star, but I already know it is not likely a star, thus the 1 cubic lightyear-sized of "bread box".

Is "20 questions" not a popular UK game during idle time?

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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.

I actually thought it was some texting form of "I see you, Lyra in Volans"!

Being Irish, I would have no idea.

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Borrowing a popular quote... "I have no idea what this means."

Oops, I should have caught that one. I should say "across the pond", instead.

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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.

Is it larger than a Milky Way sized galaxy?

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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.

__________________
- Learn a lot teaching others.

Borrowing a prior talented question...

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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.

(5) No, it is not nebular.
(4) No, it is not larger than a Milky-Way-sized galaxy.
(3) Yes, it is more than 1 cubic light year in volume.
(2) Yes, it is more massive than our Sun.
(1) Yes, most of its mass consists of gas (including ionized plasma).

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