Observable universe - Wikipedia
The observable universe is a spherical region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion.
Hubble Reveals Observable Universe Contains 10 Times More …
2016年10月13日 · Astronomers came to the surprising conclusion that there are at least 10 times more galaxies in the observable universe than previously thought. The results have clear implications for galaxy formation, and also helps shed light on an ancient astronomical paradox - why is the sky dark at night?
Hubble Skymap - NASA Science
The Hubble Skymap puts the night sky at your fingertips any time of day. Roam the Milky Way to find a selection of galaxies, stars, nebulae and more, and click for a Hubble's-eye-view of each object.
Hubble Images - NASA Science
Explore Hubble's astronomical and mission images. The latest Hubble news releases and images! A collection of galaxy images from the Hubble Space Telescope. A collection of nebula images from the Hubble Space Telescope.
The Observable Universe - ESA/Hubble
2014年11月13日 · This animation, from Hubblecast 79, zooms out from Earth to the edge of the Observable Universe. Are you a journalist? Subscribe to the ESA/Hubble Media Newsletter.
NASA's Hubble Takes the Closest-Ever Look at a Quasar
3 天之前 · The expansion of the universe stretched the light into red wavelengths. This yardstick, called cosmological redshift, corresponds to a distance of 2.5 billion light-years for 3C 273. That's too far away for a lone star to be seen. ... The new Hubble image is opening a gateway into better understanding quasars. Hubble's vision is so sharp it ...
Observable universe | Definition, Size, Description, & Facts
2024年11月23日 · Observable universe, the region of space that humans can actually or theoretically observe with the aid of technology. The observable universe, which can be thought of as a bubble with Earth at its centre, is differentiated from the entirety of the universe, which is the whole cosmic system of
Hubble volume - Wikipedia
In cosmology, a Hubble volume (named for the astronomer Edwin Hubble) or Hubble sphere, Hubble bubble, subluminal sphere, causal sphere and sphere of causality is a spherical region of the observable universe surrounding an observer beyond which objects recede from that observer at a rate greater than the speed of light due to the expansion of ...
NASA’s Webb, Hubble Combine to Create Most Colorful View of Universe
2023年11月9日 · NASA’s James Webb Space Telescope and Hubble Space Telescope have united to study an expansive galaxy cluster known as MACS0416. The resulting panchromatic image combines visible and infrared light to assemble one of the most comprehensive views of the universe ever taken.
Hubble Reveals Observable Universe Contains 10 Times More …
2016年10月13日 · The universe suddenly looks a lot more crowded, thanks to a deep-sky census assembled from surveys taken by NASA's Hubble Space Telescope and other observatories. Astronomers came to the surprising conclusion that there are at least 10 times more galaxies in the observable universe than previously thought.
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