A team reports on an initial sample of 118 old, low-mass stars observed by the Transiting Exoplanet Survey Satellite and explore the pulsation modes seen in these abundant variable stars.
Astronomers have constrained the properties of three stars tidally disrupted by black holes and found that stars in the 1–2 solar mass range are over-represented, which may have implications for star formation or migration.
Deep optical and ultraviolet observations of a young, massive star cluster in the Large Magellanic Cloud find no evidence of multiple populations among the evolved red giant branch stars, unlike other clusters.
A survey of young stars that are surrounded by disks but appear not to be accreting material reveals that 20–30% of these so-called non-accretors are still collecting material, albeit at a reduced rate.
Wind tunnel simulations show that electrical charging of dust grains might mean that particle transport on Mars’s surface can be restarted more easily after winds die down than previously thought.
New laboratory experiments demonstrate that grains of carbon dioxide ice stick together when they collide at velocities at or below 0.1 meter per second, but begin to fragment at velocities above one meter per second.