Precise measurements of stars’ motions show that a wave is propagating outward from our galaxy’s center — perhaps from a long-ago collision with another galaxy.
Ground-based telescopes have a fundamental problem that no amount of engineering can fix. They're trying to observe the universe through Earth's atmosphere, a constantly moving blanket of air that distorts and blurs incoming light. It's a little like trying to take a photograph of the bottom of a stream where the water is gently flowing! Space telescopes like Hubble easily sidestep this issue by operating above the atmosphere, but they can only photograph tiny slivers of sky. Now, researchers at Johns Hopkins University have developed a clever mathematical solution that could give ground based telescopes near space quality vision whilst retaining their ability to survey vast swathes of space!

