You might find it hard to imagine gravity as a weak force, but consider that a small magnet, can hold up a paper clip, even though the entire earth is pulling down on it.
The Milky Way Rise Panorama
Image Credit: Navaneeth Unnikrishnan Photography
If the moon were only 1 pixel on your screen, how big would the rest of the solar system be?
Just click this link, I beg you, and prepare to have your mind blown.
Absolutely amazing. Fantastic work by designer Josh Worth.
For a a different look at the problem of cosmic distance, check out my video “How Big is the Solar System?”:
And for lots more fun ways to look at the scale of the universe maybe watch this one called (naturally) "The Scale of the Universe":
How Antibodies work.
Your immune system is composed of a fleet of cells designed to keep antigens out. An antigen is anything that causes a specific immune response. Whether that be the H1N1 virus or some Axe cologne. In either case your body will ‘attack’ any antigens on site with the use of antibodies. These are Y shaped structures made by special B cells in your body. Once your body identifies an antigen and a shape to attach to it B cells make the respective antibodies and are released into the blood. These Y shaped antibodies will cause 4 things to happen to the antigens.
Block the binding site of the antigen to prevent future infections
Clump the antigens into clusters
Precipitate them from your blood
Activate the bodies compliment system
#4 refers to special proteins that will create holes in the cell wall of any bacteria that will kill them.
The Lights in the Sky Have Finally Arrived
Image Credit; AuroraMax
What is the most astounding fact you can share with us about the Universe?
Neil deGrasse Tyson, PhD: The most astounding fact… is the knowledge that the atoms that comprise life on Earth, the atoms that make up the human body, are traceable to the crucibles that cooked light elements into heavy elements in their core under extreme temperatures and pressures. These stars, the high mass ones among them went unstable in their later years they collapsed and then exploded scattering their enriched guts across the galaxy. Guts made of carbon, nitrogen, oxygen and all the fundamental ingredients of life itself. These ingredients become part of gas cloud that condense, collapse, form the next generation of solar systems… stars with orbiting planets, and those planets now have the ingredients for life itself.
So that when I look up at the night sky and I know that yes, we are part of this universe, we are in this universe, but perhaps more important than both of those facts is that the universe is in us.
When I reflect on that fact, I look up – many people feel small because they’re small and the universe is big – but I feel big, because my atoms came from those stars. There’s a level of connectivity. That’s really what you want in life, you want to feel connected, you want to feel relevant, you want to feel like a participant in the goings-on of activities and events around you. That’s precisely what we are, just by being alive…
A beautifully animated description of what we know about the creation of the Universe, so far.
We can see most of the how, though who knows how long this can last. Does the universe build in enough time for the beings that study it, to reveal why it happened? We’ll see I guess. :D
A giant black hole may have hurled a star cluster toward us at record speed
Most of the universe is rushing away from us. It’s not that we’re particularly repellent; it’s just that the universe is expanding, pushing most other galaxies away. Light from distant galaxies travels toward us through this expanding space, which stretches their light to longer, or redder, wavelengths. As a result, the spectra of most galaxies exhibit redshifts.
We chatted with legendary astrophysicist Neil deGrasse Tyson on extraterrestrial life and more.
Popular Science: Would you rather have a jetpack or flying car?
Neil deGrasse Tyson: What I would rather have is a transportation system that requires neither: a wormhole.
PS: What incredible thing will we see in our lifetime?
NDT: I think that we will know whether or not there’s life on planets other than Earth. And I think the best location would be on Mars or on Jupiter’s moon Europa.
PS: When we find life on other planets, is it going to come and eat us?
NDT: No. People’s first thought every time scientists discover something new is, “Oh, my gosh, you created a virus, so there’s gonna be a killer virus.” I’m not more afraid of something I might find on Mars than I am of a polar bear who’s pissed off because his ice floe is melting.
Read the rest of the Q&A here.
Synesthesia is a neurological trait that combines two or more senses. Synesthetes may taste the number 9 or attach a color to each day of the week. What color is your Friday?
From the TED-Ed Lesson What color is Tuesday? Exploring synesthesia - Richard E. Cytowic
Animation by TED-ED
Astronomers have detected bizarre swarms of comets around a nearby star, icy bodies that may have been trapped by the powerful gravitational pull of a huge, undiscovered exoplanet.
An international team of scientists spotted an enormous belt of carbon monoxide (CO) gas in the disk of debris surrounding Beta Pictoris, a young star that lies 63 light-years from Earth. The source of the gas is probably comets, and lots of them; one large comet must be getting destroyed every five minutes to keep replenishing the CO, which is destroyed by starlight, researchers said. You can see a video description of the mystery planet around Beta Pictoris here.
Peering deep into the asteroid belt between Jupiter and Mars, scientists have spotted the first disintegrating space rock ever observed.
The rock is crumbing slowly — its disparate pieces gliding gently away from each other at the sluggish rate of one mile an hour, slower than human walking speed.
The strange space rock first caught scientists’ attention in September when the Catalina and Pan STARRS sky survey telescopes detected what looked like an unusually fuzzy object on the far side of the asteroid belt.
A study conducted by local high school students and faculty from the Department of Computer and Information Science in the School of Science at Indiana University-Purdue University Indianapolis reveals new information about the motor circuits of the brain that may one day help those developing therapies to treat conditions such as stroke, schizophrenia, spinal cord injury or Alzheimer’s disease.
It sounds like a scene from a detective novel: The witness sees a body falling from the window, and then hears a loud noise that sounds like the body hitting the ground. But what if the noise actually came before the fall?
Navigating through our memories of past events seems to be easy task, but we don’t always get it right. We might remember things that didn’t happen, and we can also get the time wrong. We may remember incidents as happening closer together or farther apart than they actually did, or even completely mess up the order of events,