Yeah, just like when I cross-threaded one (1) bolt on a car I was rebuilding. Completely disproved my theory of how to build a car.

France adopted the Gregorian (modern ) calendar in 1782. Since then,1800 and 1900 have not been leap years, but I presume this clock was built to the old rules where they would be leap years.

Story is that precession was discovered by Hipparchus of Rhodes, c. 150 BC. He compared star maps from 150 years earlier, with his own observations. https://en.wikipedia.org/wiki/Hipparchus#Precession_of_the_equinoxes_(146%E2%80%93127_BC)

I would have suggested Morse code, or some variant. Telegraphers used a lot of shortcuts for common words and phrases.

I would look for a galaxy about 7.86 Mpc from us, in the direction opposite our motion through the CMBR. Since the average distance between galaxies is about 25 Mpc, there might not be any galaxies there.

550 / 70 = 7.86

"Pings"? And all this time I though it was a continuous binary phase-shift keying. More like a chirp or chipping.

I agree with most of that, except the religion part. I think the first wave of ark ships will be motivated by religious thoughts. Probably even more “religious” than the worst of todays groups. “We have to populate the galaxy before the infidels!”

How about AI controlled ships, with human germ plasma in cold storage, and artificial wombs? There have already been a few sci-fi stories that have touched on this.

“Forever” is a long time. I suggest 10 - 20 years to Mars, another 50 to the asteroid belt, then another 100 to Jupiter, etc. By the year 3500, humans will around Pluto. After that, some rich religious group might put together a generational starship, to go out to infinity (“… and beyond!”)

Light shaking reported in populated areas, no injuries.

We have a sample of an intelligent civilization? Where, pray tell?

Life is but a dream / it’s what you make it …

When the last star dies, when the last black hole evaporates, the universe will be left with just photons, electrons, and neutrinos (and their antiparticles). These will never meet, or if in very very rare circumstances they do meet, no new mass/energy conversion will happen.

There is some wild speculation that there might be another Big Bang of some sort, born out of quantum foam … but there is no way to test that idea.

It didn’t/ doesn’t take 14 billion years for the light from the BB to reach us. We (the material that became us) came into existence inside the BB … in the middle of an infinite space. The light from the BB started hitting us immediately, from all directions. It has been hitting us ever since. The light that is hitting now has been traveling for 14 billion years. It comes from a distance that used to be a lot closer, but is now 46 billion light-years away.

(Much simplified, but I hope not too misleading.)

No, we are not in a void. The Milky Way is part of the local group of galaxies, which is part of the Virgo supercluster of galaxies.

Same “amount” of gravity in less space, close to the BH. if you were the same distance above the star and the BH, you would feel the same force. But with a BH, you can get 100 km (for example) from the center and still be outside the BH. With a star, if you were 100 km from the center you would be deep inside.

No, we can’t photograph the Hawking radiation. It’s much (much!) to weak. What we can see is the accretion ring around the BH, which is very hot and glowing.

It’s kind of like measuring a room from north to south and getting 20 feet, but from south to north it’s 20 feet 1 inch. And now we’re even more sure about that 1 inch difference.

The force of the MOON on you is not equal to the force of the EARTH on you, that much is true. But the force of the moon on you is equal to the force of you on the moon. For any two bodies X and Y, the gravitation force of X on Y is equal to the force of Y on X.

You fall faster on Earth because the force is 6 times more than on the Moon. They don't accelerate at 6 m/s^(2), because even thought they feel the same force you do, they are many billion of times more massive.

Acceleration = Force / Mass

On Earth, your acceleration is 9.81 m/s^(2). Earth's acceleration toward you is 8.21 x 10^(-23) m/s^(2).

The forces are equal. The responses to the forces are unequal.

M87 is pulling on you exactly as much as you pull on M87. The forces are equal and opposite, at about 1 x 10^(-24) N. Which is super small.

EDIT: if there were no other forces involved (like Earth's gravity), that much force would move you about 0.1 micrometers in 100 years. For comparison, a red blood cell is 7 micrometers diameter.

3. Las Vagas (stabbings), DC, Dearborn ...

In a few weeks, we're going to have a 24-hour "active shooting" channel. Plus knife stabbings, of course.

This type of analysis had been done for years. https://www.amazon.com/Historical-Eclipses-Rotation-Richard-Stephenson/dp/0521461944 https://royalsocietypublishing.org/doi/full/10.1098/rspa.2016.0404