Scientific American 13 Feb 2020, 16:16 UTC How the Celebrated "Pale Blue Dot" Image Came to Be
Bad Astronomy 13 Feb 2020, 14:00 UTC The placements of the planets in our solar system are pretty stable. By that I mean their orbits don't change much over time. There are changes, to be sure, but they tend to be slow or cyclic, and any big changes would take millions, if not billions, of years to play out.
Centauri Dreams 12 Feb 2020, 17:02 UTC 330 light years from the Sun is the infant planet 2MASS 1155-7919 b, recently discovered in Gaia data by a team from the Rochester Institute of Technology. It’s a useful world to have in our catalog because we have no newborn massive planet closer to Earth than this one. Circling a star in the Epsilon Chamaeleontis Association, 2MASS 1155-7919 b is thought to be no more than 5 million years old, orbiting its host at roughly 600 times the Earth/Sun distance. A stellar association like Epsilon Chamaeleontis is a loose cluster, with stars that have a common origin but are no longer gravitationally bound as they move in rough proximity through space.
Discover 12 Feb 2020, 13:00 UTC
Universe Today 12 Feb 2020, 02:49 UTC This summer, between mid-July and early August, the Mars 2020 rover will launch, reaching Mars by February of 2021. Once it touched down in the Jezero Crater, it will carry on in the footsteps of its predecessor – the Curiosity rover. This will include searching for evidence of Mars’ past habitability and the possible existence of life (past and present), as well as a sample-return mission.
Universe Today 11 Feb 2020, 20:52 UTC Picture the space around Earth filled with tens of thousands of communications satellites. That scenario is slowly coming into being, and it has astronomers concerned. Now a group of astronomers have written a paper outlining their detailed concerns, and how all of these satellites could have a severe, negative impact on ground-based astronomy.
Symmetry 11 Feb 2020, 15:57 UTC There are a lot of things scientists don’t know about dark matter: Can we catch it in a detector? Can we make it in a lab? What kinds of particles is it made of? Is it made of more than one kind of particle? Is it even made of particles at all? In short, dark matter is still pretty mysterious. The term is really just the name scientists gave to an ingredient that seems to be missing from our understanding of the universe. But there are some things scientists can definitively say about the stuff.
Bad Astronomy 11 Feb 2020, 14:00 UTC As I write this, over 4,100 exoplanets — planets orbiting other stars — have been discovered, with more found nearly every day. The first was announced in 1992 and things progressed slowly at first, but we now have dedicated space missions looking for them, and that total number has and will continue increase a lot.
Bad Astronomy 10 Feb 2020, 14:00 UTC CHEOPS is a European Space Agency exoplanet hunting mission — the CHaracterising ExOPlanet Satellite*. It will look at bright stars already known to host exoplanets, taking extremely accurate measurements of their brightness over time.