The tiny Martian moons Phobos and Deimos were initially thought to be captured asteroids. Now, it looks like they might be remnants of a collision 4.3 billion years ago. Can simulations help us figure out what they’re made of?
How much tidal stress does Jupiter put on Europa? Enough to break the ice. Panning et al. estimate the magnitude of the ambient seismic noise on Europa due to tidal cracking events and turbulence in its subsurface ocean.
The potentially Earth-like exoplanet Proxima Centauri b is only 4.22 light-years away. However, even at the speed of Voyager 1, it would take over 75,000 years to reach the Alpha Centauri system. Can impatient humans find a faster way there? Today’s bite explores one possible way to reach the stars.
Interstellar space should be littered with debris ejected during the formation of planetary systems—but how much? Engelhardt et al. use solar system surveys and simulations to place an upper limit on the number density of asteroids and comets roaming the Milky Way without a parent star.
Bright surface features ring Titan’s north polar lakes and trace out dry lake beds. Could these same features in the equatorial desert regions indicate that what is now desert was once covered in liquid?