The energy in the sunlight we see today started out in the core of the Sun 30,000 years ago – it spent most of this time passing through the dense atoms that make the sun and just 8 minutes to reach us once it had left the Sun! The temperature at the core of the sun is 13,600,000 kelvins. All of the energy produced by fusion in the core must travel through many successive layers to the solar photosphere before it escapes into space as sunlight or kinetic energy of particles.

The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
The actual density of Saturn is 0.687 g/cm³while the density of water is 0.998 g/cm³. At the equator Saturn has a radius of 60,268 ± 4 km – which means you would need an extremely large glass of water to test this out.

Hey did you all hear about the magnetic storm that was supposed to hit Earth today?

sabaism: (noun) the worship of stars

Honestly though, wouldn’t be the first time we were all living in ignorance.

Such a cool idea!

Thanks to Breezy for this submission!

This is a four-part special on Nova on PBS all about space, matter, the universe, time, energy, and all that sort of science-y/physics-y stuff. 

Here’s the website description: 
“The Fabric of the Cosmos,” a four-hour series based on the book by renowned physicist and author Brian Greene, takes us to the frontiers of physics to see how scientists are piecing together the most complete picture yet of space, time, and the universe. With each step, audiences will discover that just beneath the surface of our everyday experience lies a world we’d hardly recognize—a startling world far stranger and more wondrous than anyone expected.

Brian Greene is going to let you in on a secret: We’ve all been deceived. Our perceptions of time and space have led us astray. Much of what we thought we knew about our universe—that the past has already happened and the future is yet to be, that space is just an empty void, that our universe is the only universe that exists—just might be wrong.

Here’s the link to the first of the four-part series. (It’s also available for download in HD on iTunes for free!) It’s called The Fabric of the Cosmos: What is Space? and it answers exactly that. There may be a lot more to what you consider “empty space”!

The second part of the series is on at 9pm tonight on PBS, and it’s called The Fabric of the Cosmos: The Illusion of Time. It’s going to talk about how everything we know about time may be a lie.

Check it out! It’s wicked cool! I hope you guys enjoy it!