From eso.org: “Observations made with ESO’s Very Large Telescope have for the first time revealed the effects predicted by Einstein’s general relativity on the motion of a star passing through the extreme gravitational field near the supermassive black hole in the centre of the Milky Way. This long-sought result represents the climax of a 26-year-long observation campaign using ESO’s telescopes in Chile.”
The Washington Post has a good article, “What the new gravitational waves discovery means for the future of astronomy.”
In my younger days this wasn't much of a problem. Unfortunately gravity seems to have increased significantly since the 1980s.
From bbc.com, scientists are reporting yet another burst of gravitational waves.
“NASA’s Curiosity rover usually keeps its instruments firmly focused on Mars’s ground, zapping grit with its laser or drilling cores in bedrock. But every few days, the SUV-sized robot, like any good dreamer, shifts its sights upward to the clouds. Well into its fifth year, the rover has now shot more than 500 movies of the clouds above it, including the first ground-based view of martian clouds shaped by gravity waves ...”
(See the story for more information, and some animations which unfortunately just keep endlessly repeating.)
Here’s a link to a wired.com article, Quantum Gravity Research Could Unearth the True Nature of Time.
I was just working on centering some components in an Android
LinearLayout and came upon this helpful advice:
android:gravity takes care of its children,
android:layout_gravity takes care of itself
So, in my case, where I wanted to center two buttons horizontally in a
LinearLayout, I used
I needed to center some tabs in a scrolling tab view layout in an Android application, and this technique worked for me. Note that the
wrap_content part is needed for the width setting. Image is from this SO link.
An asteroid with rings. I never would have guessed that a 90-mile diameter rock would have enough gravitational force to support rings. The story is here.