Mysterious ocean-floor trails show Arctic sponges on the move

The aquatic animal known as the sponge is often described as entirely sessile: once they've settled in a spot and matured, they aren't generally thought of as moving around. But, according to a new study in the journal Current ...

Video: Gaia's stellar motion for the next 1.6 million years

The stars are constantly moving across the sky. Known as proper motion, this motion is imperceptible to the unaided eye but is being measured with increasing precision by Gaia. This animation shows the proper motions of 40 ...

Image: Foreground asteroid passing the Crab Nebula

When astronomers use the NASA/ESA Hubble Space Telescope to study the deep sky, asteroids from our solar system can leave their marks on the captured pictures of far-away galaxies or nebulae. But rather than be annoyed at ...

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