Wars have been started for less.
It's not the proximity of another moon that produces tidal forces. Just going around Saturn is enough to produce the stresses that induce heat.
Only if the orbit is eccentric. If there aren't other moons, viscoeleastic damping circularizes the orbit until the tidal heating disappears-- it's the other moons that perturb Europa's orbit to make it slightly eccentric, giving it the tidal forces that heat it.
What do they mean by 'nearby'?
They mean, in our solar system rather than in a solar system a hundred light years away.
Well then by the same logic you can't really see matter either. All you see is reflected photons.
Well, sure. But you see the photons reflected or emitted by the matter. On the other hand, you can't see photons reflected or emitted by a black hole, because black holes do not reflect or emit photons.
All in the last month. Can't put them down.
There is no need for "at once".
Yes there is. You're thinking of parallax, but what they are doing is interferometry, so they will be comparing the phase of radio signals received on opposite sides of the globe. That has to be done simultaneously.
You can't, of course, "see" a black hole, even with radio waves: a black hole is by definition what you can't see.(*)
What they are looking to image is the radio emissions from material falling into the black hole. You can't see the black hole itself.
*footnote: Black holes do emit Hawking radiation, which in principle is detectable. But the peculiar property of Hawking radiation is that the smaller the black hole the more Hawking radiation. Only exceptionally tiny black holes emit enough to possibly detect-- a black hole ten micro meters across will emit just about the same amount of Hawking radiation as the microwave background.
Different observers see time passing at different rates, of course, and thus the rate of expansion is indeed observer dependent. But all of the observers still see the universe expanding.
It's a trivially small effect, though, unless you're in a gravity well so deep you're poised on the edge of an event horizon, or moving at speeds that are a significant fraction of the speed of light.
...., and if we used an alternative voting system to avoid the spoiler effect, then we certainly would have voted in a candidate more people prefer.
That's the point: the vote counting methodology has to be changed to eliminate the spoiler effect. "If the other Republican, Democrat, third party, and independent candidates had a presence in the final election and in the debates," is not the issue. The spoiler effect is.
Look, here's the way the vote counting currently works: third candidates have to take votes away from one or both of the other candidates, and in fact, what happens is that they take votes away from the candidate that is most similar to them. So, with the current system, a third party is friendly-fire: it: always results in fewer votes for the candidate that the third party candidate most agrees with.
This has to be changed if third party candidates are to have any viabiliity.
The US has carried a constant debt since the US Civil War. Debt is literally what makes the world go round.
If by "literally" you mean "figuratively,"
I'm surprised this one isn't tagged "What could possibly go wrong?"
That's right. And the mathematics I was taught in grade school was wrong, too. Correctly:
2.3 is less than 2.6, but
2 is fewer than 3.
Yes, it seems dumb to put the data in some weird non-standard film-based format.
Books. Those last.
What this country needs is a good five cent nickel.