Webb not only provides incredibly distant views, it does so with such clarity that it allows scientists to study the ages, histories and makeup of the earliest galaxies while they follow our universe’s story back in time towards the Big Bang. These galaxies, which appear faint and red in the image, had never been seen before, and already scientists are studying their composition as Webb reveals concentrations of elements like oxygen, hydrogen and neon within them. SMACS 0723’s combined mass boosts Webb’s power, acting as a gravitational lens that magnifies the far more distant galaxies behind it. Webb’s First Deep Field, as it’s called, is a composite of images at different wavelengths compiled from the telescope’s Near-Infrared Camera in just 12.5 hours. The deepest, sharpest infrared image ever captured of the distant universe reveals a tableau teeming with thousands of galaxies in the cluster SMACS 0723 as it appeared 4.6 billion years ago. After the shot revealed last night by President Biden, scientists released four more amazing images today, the first of many incredible visuals to come. But finally, more than three decades after its conception and after six months in orbit, the James Webb Space Telescope’s first full-color images are delivering an unprecedented look at our Universe. The wait for Webb wasn't quite that long. NASA Administrator Bill Nelson explained that images like this one, dubbed “Webb’s First Deep Field,” allow us to see the universe as it appeared far in the past-the light captured from these galaxies has been traveling through space for 4.6 billion years. Just a century ago scientists believed there was only one galaxy, but this image reveals thousands-all found in a tiny speck of sky comparable in size to a single grain of sand held on a finger at arm’s length by someone standing on the ground. The deepest, sharpest infrared image ever captured of the distant universe was revealed last night-a stunning display of the galaxy cluster SMACS 0723 delivered by the recently launched James Webb Space Telescope.
"When it comes to developing strategies for possible impacts, having more warning time is everything."įollow Stefanie Waldek on Twitter. "With the high-power system, we could study more objects much further away," Patrick said. "The asteroid is about a kilometer in size, which is large enough to cause global devastation should there be an impact."Īnd radar is a vital tool for astronomers looking to precisely map an asteroid's trajectory and evaluate whether it poses a threat to Earth. "In our tests, we were able to zero in on an asteroid 2.1 million kilometers away from us - more than five times the distance from the Earth to the moon," Taylor said.
The team tested the prototype on a space rock as well as the moon. US planetary radar may get a boost from Green Bank Observatory Just how many threatening asteroids are there? It's complicated. Ground-based radar could be one of our best tools against asteroids, new decadal survey finds
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