Saturn Eclipses The Sun, Seen From The Cassini Orbiter, 15.Sept.2006

The clearest photo ever taken of Saturn

Planetary Satellites (1977)

The Fermi Paradox

Once upon a time, scientists decided, “what would happen if we point Hubble at this dark piece of the sky and leave the exposure open for an absurd amount of time?” Said scientists then experienced sudden bowel incontinence from the results. Vast specks of light, like the first image and when zoomed in, each individual speck of light is it’s own galaxy with it’s own solar systems.

Seeing the sheer vastness of the universe and that it’s so large, it’s incomprehensible to our feeble minds, is it possible that we’re alone? Where are all the aliens?

The Fermi Paradox tries to describe why we seem to be alone in a vast sea of endless possibilities for intelligent life to form. Life seems to form easily, surely it’s the same elsewhere.

Here’s some main bullet point arguments as to why we’re seemingly alone.

• We’re too far apart, separated by vast space and time • We’re rare or we’re the first • The aliens don’t have advanced technology (we don’t either). Think of it this way, an octopus or a crow is intelligent life. They’ve never even visited the moon. • Mass extinctions happen more often than not, they might be dead or intelligent life never exists long enough to make contact with each other before it’s wiped out • We haven’t existed long enough to be discovered or to figure out how to find others • They’re too advanced for us • It’s simple nature of intelligent life to eventually wipe itself out • Intelligent life has discovered that it’s too dangers to be in contact • We’re not listening properly for their messages. It’s like trying to listen to a CD on a record player - it won’t work. • We’re not contacted because we’re in a simulation or an alien zoo • Maybe they’re already here, observing • Maybe they’re here (e.g. UFOs?) we just don’t know how to talk to them or acknoweldge them. We laugh at most UFO reports.

Heart-shaped Moon

Moon (Jun. 23, 2020)

Umbriel as seen by Voyager 2 in 1986. At the top is the large crater Wunda, whose walls enclose a ring of bright material.

Credit: NASA

Venus has LOCKED tectonic plates??? How does that work? How are they even counted as individual plates if it’s the tectonic equivalent of Pangea?

it's not so much that Venus's tectonic plates are locked, it's more that it never had them in the first place!

which is a major surprise, actually, because Venus is the most Earth-like of the other planets in our solar system.

surprise?

"what," you may say, flailing in consternation, "about Mars?? why are we trying to colonize Mars if Venus is more Earth-like???"

and it's a good question! Venus IS technically more Earth-like in the sense that it's right next door, is a solid 80% the size of Earth, and has both a working atmosphere and a liquid mantle composed of molten rock, BUT- it's also important to note that Venus is the hottest planet in the solar system and it rains boiling sulfuric acid at almost all times! our first probes to the damn place actually melted. MELTED.

this is what Hell looks like.

BUT ANYWAY so Venus is the planet in our solar system that's the MOST physically similar to Earth, our dear mother who does not rain boiling sulfuric acid on our heads hardly at all ever, so it's kind of a shock that its geology is COMPLETELY FUCKING DIFFERENT.

see, Earth's outer crust is broken up into a series of mind-breakingly-massive tectonic plates that sort of skid around on top of the liquid mantle, slowly drifting in different directions driven by Earth's rotation and bonking into each other randomly like a 300-million-year-long Pinball tournament!

but on Venus, the entire outer crust is a single solid piece sitting on top of the liquid mantle, like the peel of an orange.

though not as good for you. because of the whole Boiling Acid thing.

and contrary to what you might think, this actually makes Venus a VERY VIOLENT place! the outer crust twists and deforms slightly as the liquid mantle spins under it, like a water balloon being flung repeatedly against a wall by a small child, but all of that force can't really be dispersed because the crust is a single solid piece of rigid rock!

so what happens is that this force builds and builds and BUILDS until Venus can't take the strain anymore and has a very volcanic tantrum about it.

unlike the rest of the solar system, the surface of Venus is made of relatively new and entirely volcanic rock- because the entire planet is basically having a planet-wide eruption event at all times, with multiple huge volcanos just spewing gigantic amounts of liquid rock everywhere like it's their damn job, to the point where Venus is just getting resurfaced like a McDonalds parking lot every epoch or so.

aren't you glad Earth doesn't do this? I am SO glad Earth doesn't do this.

(much, anyway)

uh anyway that's why we're trying to colonize Mars instead, and why plate tectonics are a GOOD thing! thanks for coming to my TED talk bye

:)

A near-infrared view of the giant planet Uranus with rings and some of its moons, obtained on November 19, 2002, with the ISAAC multi-mode instrument on the 8.2-m VLT ANTU telescope at the ESO Paranal Observatory (Chile). The moons are identified; the unidentified, round object to the left is a background star. The image scale in indicated by the bar.

Credit: ESO

Pluto as seen from NASA’s New Horizons spacecraft ; Its heart-shaped sea is filled with poisonous ice.