Talk:2009: Hertzsprung-Russell Diagram

Explain xkcd: It's 'cause you're dumb.
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How the heck is a lava cake more luminous than a campfire? (talk) (please sign your comments with ~~~~)

It's Lava Lake, as in a large puddle of lava.Cgrimes85 (talk) 15:45, 20 June 2018 (UTC)

As it's a logarithmic scale, is it more correct to say the plot been expanded to 1 on both axes? Cgrimes85 (talk) 15:47, 20 June 2018 (UTC)

It seems Randall thinks an astronomer is about as bright as a lightbulb, probably due to the Hertzsprung-Russell diagram itself! Ianrbibtitlht (talk) 15:52, 20 June 2018 (UTC)

A daily food consumption of average human is about 100W when spread out over 24 hours
It might actually be about that bright, but in the infrared spectrum. 20:54, 20 June 2018 (UTC)
But they are no where near as hot! 20:57, 20 June 2018 (UTC)

While wattage is used as an informal proxy for bulb brightness, there is not a 1-to-1 relationship between power consumption and light output. Incandescent bulbs in the United States were commonly labeled with both watts consumed and lumens output to aid consumers in choosing efficient bulbs.

Ivanpah doesn't have a salt tank. Presumably he meant the boiler, and/or was confusing it with Crescent Dunes. Wwoods (talk) 17:29, 20 June 2018 (UTC)

I understand the explanation, but what's the joke?

The title text says "The Hertzsprung-Russell diagram is located in its own lower right corner, unless you're viewing it on an unusually big screen." But it's clearly on the top left corner... Am I missing something? 18:47, 20 June 2018 (UTC)

Why would it be at the top left...? The diagram itself is not particularly luminous, so would not be at the top, and its apparent temperature is quite low, so it would not be on the left.

Why is a blue whale considered more luminous than a campfire? Blue whales don't generate any light.

In one of the interesting parts of this diagram not that many mundane objects (or at least smaller than earth objects) are much hotter than most stars (surface temperature)... Not mentioned now.--Kynde (talk) 20:33, 20 June 2018 (UTC)