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2CA4Y7K Comet crashing into earth

If an antimatter meteor came into our solar system, how would we know?

If an antimatter meteor came into our solar system, we鈥檇 definitely know about it, says one reader, especially if it hit the sun

2M5GPCD Preparations of plants with bubble wrap for the winter

Should bubble wrap face the inside or outside of the object? Part 2

This sequence of artist's illustrations shows how a black hole can devour a bypassing star. 1. A normal star passes near a supermassive black hole in the center of a galaxy. 2. The star's outer gasses are pulled into the black hole's gravitational fie

This week鈥檚 new questions

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Kim Kardashian has wrangled an invite to NASA HQ. Can we get one too?

Technology

Remarkable robot images provide a vision of the future

Twisteddoodles: ‘I’m a little beaker, short and stout…’

Tom Gauld on a portal to an alternate universe

This image may not be used on retail merchandise in the U.S.A. Leonid meteor and Pleiades star cluster. Optical image of a Leonid meteor (bright streak) to the left of the Pleiades star cluster. Meteors, or shooting stars, are tiny particles of dust which enter the Earth's atmosphere with speeds of 35-95 kilometres per second. Air resistance heats the particles, making them visible as streaks of light. The Leonid meteor shower occurs annually around 17th November when the Earth crosses the path of debris produced by the Tempel-Tuttle 1886 I comet. The Pleiades (Seven Sisters) star cluster contains about 3000 stars. It is about 390 light years from Earth in the constellation Taurus.

Space

Here’s how to spot the Leonid meteor shower this month

Disappointed woman packing for a journey: she is standing in front of her suitcase overfilled with clothes, travel and vacations concept; Shutterstock ID 2314449417; purchase_order: -; job: -; client: -; other:

How do you get the most clothes into a suitcase?

Quantum correlation- 3d rendered image of quantum entanglement. Abstract background. Quantum mechanics background. Atomic structure, large collider, CERN concept. Muon Spinning particle, muon g-2, Higgs boson light speed neon stripes abstract image. Collision of Particles in the Abstract Collider.

What happens if an entangled particle falls into a black hole?

The answer to this question depends on how you think about quantum gravity, explains physicist Vlatko Vedral

Why do rainbows refract light into many colours but not clouds? Part 2

Is short-sightedness found in other animals? Part 3

This week鈥檚 new questions

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Is a robot programmed to prank you annoying? Yes