What is Earth?

At approximately 10^11 years after the Big Bang, the Sun will swell to engulf Mercury, Venus, and possibly Earth, ending life on Earth.

“If you just go up to here, 10^ the 11 years, what happens here is the sun will get bigger and bigger. It swells. It eats up the close planets, Mercury and Venus. It may swallow up the Earth, too.”

Black holes do not gravitationally consume nearby objects that are already in orbit. Earth would continue orbiting a black-hole Sun, just losing heat.

“If the sun became a black hole, for example, we would still orbit it. It would get very cold very quickly, but we would still orbit.”

Neil deGrasse Tyson on black holes not automatically consuming nearby objects.

“If the sun became a black hole, for example, we would still orbit it. It would get very cold very quickly, but we would still orbit.”

Charles Liu on humanity's inadvertent first cosmic broadcast.

“We have already displayed ourselves to the universe by leaked radio waves that have been leaving Earth ever since the Hitler rallies of the 19 thirties.”

Adam Becker uses Mars terraforming as a logical test for Earth climate capability: any civilization with the technology to terraform Mars could trivially solve climate change on Earth, so our inability to solve climate change is proof we cannot terraform Mars.

“We're not terraforming Mars. If we if we had the technology and knowhow we would need to do something like that then solving climate change here on Earth really would be a technological problem and you could solve it very easily.”

The earliest detectable radio signals leaking from Earth into space originated in the 1930s, from Nazi rally broadcasts.

“We have already displayed ourselves to the universe by leaked radio waves that have been leaving Earth ever since the Hitler rallies of the 19 thirties.”

If the Sun became a black hole, Earth's orbit would remain unchanged because the gravitational mass would be the same, though Earth would lose sunlight.

“If the sun became a black hole today, Earth would plunge into darkness, but we can still continue to orbit around it in just the same way we are right now.”

At current energy growth rates, humanity would use all of Earth's incoming solar energy within 300 to 400 years.

“It's 3 or 400 years somewhere in there.”

Solar magnetic polarity matters less for space weather at Earth than CME intensity and magnetic field strength, cutting against common emphasis on the solar cycle flip.

“What the solar polarity is doing is less consequential.”

Life on Earth emerged roughly 200 million years after the planet cooled, about 5 percent of Earth's 4-billion-year age.

“At 4 billion years now, you start the clock and you have life 200 million years.”