Physics
Explainer: The fundamental forces
Four fundamental forces control all interactions between matter, from the smallest subatomic particles to the largest structures in the universe.
By Trisha Muro
MS-PS2-4
Construct and present arguments using evidence to support the claim that gravitational interactions are attractive and depend on the masses of interacting objects.
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TechThis crumb-sized camera uses artificial intelligence to get big results
Researchers have developed a camera the size of a coarse grain of salt that takes amazingly clear photos.
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PhysicsScientists Say: Mass
Mass shows how much an object resists speeding up or slowing down when force is applied — a measure of how much matter is in it.
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PhysicsStaying grounded in space requires artificial gravity
On TV, people in space walk around like they’re on Earth. How can science give real astronauts artificial gravity? Spin right round, baby.
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PhysicsLight levitation might help explore Earth’s ‘ignorosphere’
A toy called a light mill inspired researchers to invent a new way to fly. They’re using light to levitate small nanotube-coated discs.
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SpaceNASA’s Parker probe spots rogue waves and magnetic islands on the sun
The Parker probe’s first data is giving scientists a look at what’s to come as the craft moves closer to the sun over the next few years.
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SpaceExplainer: Understanding meteors and meteor showers
Meteors regularly enter Earth’s atmosphere. Most ‘shooting stars’ pose few risks to life on the ground, but the rare big ones can be lethal.
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PhysicsFalling through Earth might be a long and fruitless trip
A classic physics problem asks what would happen if you plunged through Earth’s center. A new study contends you could never make it to the other side.
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PlanetsJuno’s knocking on Jupiter’s door
The Juno spacecraft will peer into Jupiter’s clouds and fly in close to its monstrous auroras.
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FossilsIdentifying ancient trees from their amber
A Swedish teen’s analyses of a sample of amber may have uncovered a previously unknown type of ancient tree.