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“The asteroids get their energy from the Sun, a lot of that energy, especially on a dark asteroid like Bennu, is absorbed, causing the asteroid’s surface to heat up. It has to release that energy back out into space, and when that happens it acts likes like a thruster and changes the trajectory of the asteroid.
“So if you want to be able to predict where an object like Bennu is going to be in the future, you have you to account for this phenomenon, and we’re going to provide the best-ever scientific investigation of this fascinating concept.”
OSIRIS-REx probe launched to asteroid in compelling search for the origins of life – Spaceflight Now[^]
Marc
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That's really interesting. Very cool to think about how energy is absorbed and then used in a different way and how it actually creates a form of propulsion in space. Wow.
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What if our slight interaction with the asteroid changed its trajectory just enough so that Earth might experience a very bad day a few years from now? 
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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You are joking, yet unsure. They (who's they anyway?) say that jokes contain a minimum of 20% truth - the more truth, the greater the impact of the joke.
I agree with your joke. 
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That's the ButterflYarkovSKY Effect or is that the ICan'tBelieveIt'sNotButterflYarkovSKY Effect?
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I wish I had an "EFFECT" named after me.
So far, I've only got Murphy's Law, and they misspelled my name completely.
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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W∴ Balboos wrote: I wish I had an "EFFECT" named after me.
You do - its just NSFW so I can't tell you about it here in the Lounge. 
In this present crisis, government is not the solution to our problem; government is the problem. ~ Ronald Reagan
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So if you heat something that's made of a combination of materials up, some of the materials may expand and be ejected, causing a change in the angular momentum of the object?
Like, does that really need a special name? I smell the need to publish a paper or lose tenure.
Me, I'd call it The Bleeding Obvious Effect.
I wanna be a eunuchs developer! Pass me a bread knife!
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Mark_Wallace wrote: some of the materials may expand and be ejected,
It's not that material is ejected, it's that the heat radiates back out into space and acts as "thrust."
Marc
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Seriously? So it's just radiated photons?
That means that we're talking of an effect that is so infinitesimal that we may never even be able to conclusively prove that it exists*, because it will be hugely overpowered by proven/provable effects.
Hell, you could equally say that the Earth's rotation and orbit are affected by the way it absorbs/reflects light, but the mass involved not only makes it impossible to prove, but also makes it unlikely to be true -- you exert a lot more force by slightly opening a tap (faucet) and letting water dribble into the sink.
* Except in abstract, of course, but I suppose that that's why numbers and "career mathematicians" exist.
I wanna be a eunuchs developer! Pass me a bread knife!
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Mark_Wallace wrote: That means that we're talking of an effect that is so infinitesimal that we may never even be able to conclusively prove that it exists*, because it will be hugely overpowered by proven/provable effects.
Not necessarily.
The effect was first measured in 1991–2003 on the asteroid 6489 Golevka. The asteroid drifted 15 km from its predicted position over twelve years (the orbit was established with great precision by a series of radar observations in 1991, 1995 and 1999) from the Arecibo radio telescope.[3]
source[^]
Marc
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Good Lord! No sooner do I mention affirmation of the consequent in one posting, but I find an example of it in another posting! How synchrowhatzitous!
The thingy drifted 15 km, therefore it was caused by the Yarkovsky effect!
... Or maybe it hit a 3cc pebble, somewhere in the millions of miles that it travelled.
I wanna be a eunuchs developer! Pass me a bread knife!
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Monotremes lay eggs and produce milk. Does that mean that a Platypus can make it’s own custard?
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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...and its own Chantilly!
EDIT: I was referring to the crème diplomate, which is also known as Italian-style Chantilly Cream.
GCS d--- s-/++ a- C++++ U+++ P- L- E-- W++ N++ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t++ 5? X R++ tv-- b+ DI+++ D++ G e++>+++ h--- ++>+++ y+++* Weapons extension: ma- k++ F+2 X
If you think 'goto' is evil, try writing an Assembly program without JMP. -- TNCaver
When I was six, there were no ones and zeroes - only zeroes. And not all of them worked. -- Ravi Bhavnani
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Echidna not, I ought to bill you for that, ducky.
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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I'd never have looked up the following (Wikipedia) - but once I did it had to be posted. You must accept full responsibility for this.
Quote: Breeding season begins in late June and extends through September. Males will form lines up to ten individuals long, the youngest echidna trailing last, that follow the female and attempt to mate. During a mating season an echidna may switch between lines. This is known as the "train" system. Two weeks after mating, a single fertilized egg, weighing 380 milligrams and being about 1.4 centimetres long, is implanted in a rear-facing pouch that has developed on the female, where it is held for ten days before hatching. The young echidna, called a puggle, is then held in the pouch for two to three months before being expelled. Puggles will stay within their mother's den for up to a year before leaving
The males organ is also a thing of wonder (q.v.[^])
| Ravings en masse^ |
|---|
| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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The Platypus really is a thing of its own.
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Awesome!
#SupportHeForShe
Government can give you nothing but what it takes from somebody else. A government big enough to give you everything you want is big enough to take everything you've got, including your freedom.-Ezra Taft Benson
You must accept 1 of 2 basic premises: Either we are alone in the universe or we are not alone. Either way, the implications are staggering!-Wernher von Braun
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I enjoy your APOD postings. Keep it up! 
Get me coffee and no one gets hurt!
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Today, I replaced my venerable, antiquated, near falling apart, ten year-old mouse and keyboard with a new LogiTech G910 kb, and a LogiTech G602 mouse. I almost feel I should bury the old kit with some kind of farewell ceremony in thanks for their long service.
I went for the G910 partly because, after trying various types of key-action mechanisms, I decided I liked the Romer-G switches more than I did the available models with Cherry MX switches, and (major factor) the Thai equivalent to NewEgg had a special on the 910 that made it substantially cheaper than other better-quality keyboards from Corsair, and other vendors. Of course, I studied the reviews of the different keyboards, trying to find reviews not written for hard-core gamers.
Adjusting to both will take some time; the mouse feels quite natural, the keyboard is requiring more attention to my fingers' (fast) speed-typing.
I'm not a gamer, and I wasn't aware of the fancy lighting capabilities of this keyboard, and I am rather amazed by them: but, why would I ever want my keyboard to run an animation where it cycles through the spectrum of colors moving from left to right across the keys ? Well, okay, that does save the cost of a lava-light, I guess
Whether I'll find a use for nine dedicated macro-keys each of which can store 3 macros, is also ... uhhhh ... up in the air, as is whether I'll ever mess around with mouse's gamer features.
The one strange thing ... and, this keyboard did not come with an alternate set of Thai characters on the keyboard ... is that the keyboard maps the shifted quote key to produce the at-sign, and shifted 2 key to double-quote. And, shifted 3 produces the British Pound character. I've gone into Win 10 and checked that the Language is set to American English, not British. The tilde key produces: ` unshifted and ¬ shifted.
@It's like this when I try to use a double-quote, and C-Sharp becomes C£.@ The at-sign now: "
I'm sure I'll find some software trick to undo this re-mapping, perhaps by asking LogiTech a support question.
There is always a price to be paid when you ... upgrade, but, I'm not complaining ... yet.
cheers, Bill
«There is a spectrum, from "clearly desirable behaviour," to "possibly dodgy behavior that still makes some sense," to "clearly undesirable behavior." We try to make the latter into warnings or, better, errors. But stuff that is in the middle category you don’t want to restrict unless there is a clear way to work around it.» Eric Lippert, May 14, 2008
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BillWoodruff wrote: but, I'm not complaining ... yet.
It's good to get yourself ready so as not to cause to much a shock to your system.
| Ravings en masse^ |
|---|
| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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Do you mean that SHIFT+3 gives £, and SHIFT+' (two right from "L") gives @ ?
If so, that's a UK layout. Which OS are you using?
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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I remember my favorite keyboard. I had a Tandy 1000 (8086) with a mechanical keyboard. It felt so great, I loved typing on it. I miss those days of typing away at the DOS prompt and programming in Turbo Pascal. 
Many respects to your old kit. 
When you are dead, you won't even know that you are dead. It's a pain only felt by others.
Same thing when you are stupid.
modified 19-Nov-21 21:01pm.
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