Two trillion galaxies. That’s the latest estimate for the number of galaxies that live — or have lived — in the observable #universe, researchers report online October 10 at arXiv.org. This updated headcount is roughly 10 times greater than previous estimates and suggests that there are a lot more galaxies out there for future telescopes to explore.(sciencenews)
Debate accelerates on #universe’s expansion speed.
A puzzling mismatch is plaguing two methods for measuring how fast the universe is expanding. When the discrepancy arose a few years ago, scientists suspected it would fade away, a symptom of measurement errors. But the latest, more precise measurements of the expansion rate — a number known as the #Hubble constant — have only deepened the mystery.(sciencenews)
Now, three new sky-gazing tools are poised to tell us even more. Each will play a unique role in deciphering the mysteries of #astronomy and #astrophysics. With them, scientists will have a clearer view into the beginning of time, see the atmospheres of #planets outside our solar system and explore the light and radio properties of #blackholes.(cnet)
