Gravitational waves can be lensed by massive galaxies so that they repeat, like an echo. Scientists are now readying to snare their first one and explore the cosmic secrets it holds.
In response to these problems, the authors of the new paper came up with a simple suggestion: a tweak to Einstein’s theory at different distance scales.
“The modification is very simple: We assume the universal constant of gravitation is different on cosmological scales, compared to smaller (like solar system or galactic) scales,” Afshordi said. “We call this a cosmic glitch.”
One such feature is lunar #lobate #scarps, long curvilinear landforms due to thrust fault movement (older rocks are pushed above younger units leading to crustal shortening.
#Lunar #Landforms indicate Geologically Recent #Seismic #Activity on the #Moon.
The moon’s steadfast illumination of our night sky has been a source of wonder and inspiration for millennia. Since the first satellite images of its surface were taken in the 1960s, our understanding of Earth’s companion through time has developed immeasurably. A complex interplay of cosmic interactions and planetary systems, the moon’s surface displays a plethora of landforms evidencing its history.
Continue reading “Lunar Landforms indicate Geologically Recent Seismic Activity on the Moon” »
Physicists haven’t yet ruled out the possibility that the universe has a complicated topology in which space loops back around on itself.
About 9.2 billion light-years from Earth is a colossal structure which has confounded astronomers.
The discovery might upend current cosmological theories.
What they’ve found is a 1.3-billion-light-year-across, almost perfect ring of galaxies. No such structure has been seen before. And it doesn’t match any known formation mechanism. It has been dubbed the “Big Ring.”
The aerospace firms are working together on Tranche 2 Tracking Layer to enhance space-based missile defence capabilities.
WASP-193 b is the second least dense planet discovered to date, after Kepler-51 d, which is much smaller,” said Dr. Khalid Barkaoui. “Its extremely low density makes it a real anomaly among the more than five thousand exoplanets discovered to date.
Can gas giant exoplanets larger than Jupiter have less density than the latter? This is what study published today in Nature Astronomy hopes to address as a team of international researchers discovered WASP-193 b in 2023, which is located just under 1,200 light-years from Earth and orbits its parent star (slightly larger than our Sun) in only 6.25 days. What’s unique about WASP-193 b is that it exhibits a radius almost 1.5 times that of Jupiter, the largest planet in our solar system, but whose mass is only 14 percent of Jupiter and whose density is just under 4 percent of Jupiter, as well. This study holds the potential to help astronomers better understand the formation and evolution of exoplanets, which continue to challenge our understanding of solar system architecture.
WASP-193 b has a density of approximately 0.059 grams per centimeter cubed (g/cm3), which is comparable to cotton candy. For context, Jupiter has a density of 1.33 g/cm3, Saturn has a density of 0.69 g/cm3, Uranus has a density of 1.27 g/cm3, and Neptune has a density of 1.64 g/cm3. Therefore, despite being larger than Jupiter, WASP-193b’s density is far less than the largest gas giant in our solar system.
Continue reading “Exploring WASP-193 b: A Cotton Candy-like Exoplanet” »
We think of GoogleDeepMind as the engine room of Google in the #AI era.
We’re sharing updates across our Gemini family of models and a glimpse of Project Astra, our vision for the future of AI assistants.
Google is trying to turn AI chatbots to intelligent systems that can reason, plan, and remember. Project Astra is a window into this potential future.
