Yep! [I later added a little distance to get the beam past the aft end.]

This example points out the "now" issue, since the spaceship is never where they "see" it; the time for the beam to reach the ship is only half the story. I wanted to use vision of the ship, in lieu of a beacon, but then the ship's length would be obvious (since the distance was known).

All yours 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.

Darn. I was just going to write that the airplane gets to Chicago at 3:45 AM, not PM, because you have to remember the International Date Line.

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The Devil offered me power. I told him I preferred aperture.

We all know that Mira (Omicron Ceti) was the first Mira-type variable to be discovered. What were the next three?

(Bloomsday tomorrow - I may not be around)

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

Just a quick one? The Booleaners will see where the ship was. They can only aim where it appeared when they received it's signal. So, by the time they shoot the laser the ship has already moved it's own length - then the laser arrives 1 full length behind the ship right?

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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

Yes, that is it. [Edit.Oops, not, see below] It is meant to serve as an example for where things really are out there. This ship was very close (1000 km) and moving relatively slow. Imagine trying to hit an object near the galactic center.

This is also counter intuitive to normal firing circumstances. Riffles and shotguns are aimed ahead of moving objects based only on bullet time to object (ignoring light's speed).

Of course, I really did not expect BAUTers to stumble with this, but I thought it might be of some interest (and I kinda missed those Booleans, too).

[Edit: OOPS, sorry Crosscountry, I misread your post. Check your math. The ship will always appear only 1/2 its length behind actual position, assuming the Booleans could see it.]

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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.

We didn't really stumble.
I at least expected more intelligence from the booleans and thought the real question was whether a beam reflected back in the direction it came from, as seen by the moving ship, would actually come back in the original direction, which Eroica answered.

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An emperor without enemies, a king without a kingdom, supported in life by the willing tribute of a free people.

C Cygni
R Hydrae
R Leonis

?

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The Devil offered me power. I told him I preferred aperture.

Ah yes, that explains Eroica's post. 180 degree reflection was the simple intent for that statement, else the Booleans might not see their beam even if it did hit the ship. Fortunately, since the beam never hits the prisms, we don't have to answer the question I didn't ask. [This question was not meant to be hard since Ken's Booleans question is about 300 posts long, and still going. ]

Here was the "non-calculator" approach to it, fwiw.

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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.

Correct!

Just to avoid confusion, my source calls the first c Cygni (lowercase c) or Chi Cygni. It was identified as a variable star by Gottfried Kirch of Berlin in 1686 or 1687.

Maraldi discovered R Hydrae's variability in 1704.

R Leonis was discovered by J. A. Koch at Danzig in 1782.

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

When I checked in at the AAVSO site, I saw that and made the (incorrect) assumption that someone had entered the letter incorrectly. It would be better to stick in the Greek character.

Let's see... it's Saturday and the Sun isn't up yet, so something simple...that I can remember...

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The Devil offered me power. I told him I preferred aperture.

I take it you are talking about the 200" Hale reflector.

The prime focus is at 660" (f/3.3), the secondary (Coudé) focus at 6000" (f/30). Here is a well-known architectural drawing

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Non sunt multiplicanda entia praeter necessitatem.

What's the color of the star(s) in this particular planetary system?

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A person's name, or a mark representing it, as signed personally or by deputy, as in subscribing a letter or other document.

Arneb is correct about the Hale telescope. The picture he posted was by Russel Porter, who did a series of drawings for the instrument which may be, overall, the best engineering drawings ever made.

Your turn, Arneb.

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The Devil offered me power. I told him I preferred aperture.

. Too tough to tell; stellarchromology is incipient and must wait upon its prerequisite - heliochromology.

Besides, ever since that anthroplogist visited the Booleans, they altered their vision to see only green. [So there are green stars, now]

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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.

Thanks, mike.

This friendly chap was immortalized in the sky twice - in antiquity and in modern times. Who is he?

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Non sunt multiplicanda entia praeter necessitatem.

Is the friendly fellow human?

Apollo (Helios) was the god of the Sun and he certainly got around, if you know what I mean.

In modern times, Apollo refers to a class of asteroids, the first of which, 1862 Apollo, was discovered in 1932.

I know this is a rather lame response but it's the best I can do at the moment.

Dave Mitsky

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Chance favors the prepared mind.
De gustibus non est disputandum.
Never attribute to malice that which can be adequately explained by stupidity.

I'd rather leave that open for the moment. The adjective, however, is of some significance.

Not the solution I had in mind.

I don't think it's lame at all.

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Non sunt multiplicanda entia praeter necessitatem.

That is an impressive drawing - practical and elegant.

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Everything I need to know I learned through Googling.

Hermes, as in the planet Mercury and the asteroid?

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