How Long Will Life on Earth Last? | Exoplanet Radio ep 42

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How long before the Earth becomes uninhabitable for all life? This is a reasonable question to ask in the context of our search for life elsewhere because it gives us a framework within which we might expect to discover life on exoplanets.
Nothing lasts forever, stars live and die over the course of hundreds of millions to billions, and in the case of red dwarf stars, trillions of years. Planets are born from the remnants of their parent stars and die over a shorter timescale. Life on those planets, if it exists, is presumed to be shorter still, governed entirely by the environments provided by the combination of the star and planetary characteristics. How long life lasts there ultimately depends on how long the star lives and how it dies.
Using our solar system as an example, since we know life arose here, how long will it last? Astronomers think they have an answer.
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8 окт 2023

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Комментарии : 14

@chesi_7_0_79 9 месяцев назад

I will never forget the first time I watched Tony on a video on my first video "The most important picture ever taken". Thank you Tony for all this time here making us dream of the Universe.

@SargeScum 9 месяцев назад

His voice, the music and of course my ever wondering feeling for the universe.

@ameyharal320 9 месяцев назад

His voice is still the same...it just sends me back in time..back in 2009❤️

@theGoogol 9 месяцев назад

Life? Pretty long. Humans? That's another story.

@theaverietts1552 9 месяцев назад

Keep up the good work!

@sushanalone 9 месяцев назад

Thanks Tony, keep it up! 👌

@cazz8017 9 месяцев назад

i give it 2 more years until we nuke ourselves Tony

@deepastronomy 9 месяцев назад

hey heh, no doubt. I just kept the discussion on astronomy turf. but yeah that

@deepashtray5605 9 месяцев назад

I remember reading that at the rate the sun grows brighter in about 500 million years it will become too bright for photosynthesis, which means the end of multicellular life on this planet. We may be at about the half way point right now.

@singhanveshak 4 месяца назад

I don't think life is gonna last long here given the awful things we are doing to our Earth, animals, ourselves

@heemanmcspeed 3 месяца назад

I don’t think life will die because of us, but it certainly has changed forever. We already have affected Earth millions of years in the future.

@Cake... 9 месяцев назад

Not even the universe is eternal. Heat death will inevitably see it dissipate to nothing more than random quantum fluctuations. And if you think there will be a 'rebirth', think again, the number of possible permutations in a multiverse is potentially infinite...

@Geomaverick124 9 месяцев назад

Complex life may die out even sooner. It depends on how the new super continent forms. If the new super continent forms at the poles then complex life may live a bit longer since ice holds onto land better than over water, it will cause planetwide cooling that can counter the increased luminosity of the sun. The tropics will still be rather intolerablely hot ... but will also be covered mostly uninterrupted water and those creatures, if any, could live way under the sea...if the supercontinent forms into any other configuration of Pangaea Ultima, complex life on earth might be relegated to the northernmost and southernmost parts of the continent. Since there would be no land at the polls for ice to hold onto, the increased luminosity of the sun will bake the planet...look up why ice forms better on land vs on water and the different super continents in the future Novopangea, Pangea Ultima, Aurica and Amasia.