安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Galaxies - NASA Science
Galaxies consist of stars, planets, and vast clouds of gas and dust, all bound together by gravity The largest contain trillions of stars and can be more than a million light-years across The smallest can contain a few thousand stars and span just a few hundred light-years
- Galaxies, Stars, Black Holes - NASA
NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery About NASA's Mission; Join Us
- Galaxies - Imagine the Universe!
Interacting galaxies imaged by the Hubble Space Telescope (Credit: NGC 4676: NASA, H Ford (JHU), G Illingworth (UCSC LO), M Clampin (STScI), G Hartig (STScI), the ACS Science Team, and ESA; Antennae: NASA, ESA, and the Hubble Heritage Team (STScI AURA)-ESA Hubble Collaboration UGC 8334: NASA, ESA, the Hubble Heritage (STScI AURA)-ESA Hubble Collaboration, and A Evans (University of
- Galaxies | NASAs UoL
Galaxies are vast cosmic islands of stars, gas, dust, and dark matter held together by gravity NASA’s space telescopes have revealed intricate details of the shapes, structures, and histories of galaxies — whether alone, as part of small groups, or within immense clusters
- What Is a Galaxy? | NASA Space Place – NASA Science for Kids
What Is a Galaxy? The Short Answer: A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity We live on a planet called Earth that is part of our solar system But where is our solar system? It’s a small part of the Milky Way Galaxy
- Galaxy Types - Science@NASA
Scientists sometimes categorize galaxies based on their shapes and physical features Other classifications organize galaxies by the activity in their central regions – powered by a supersized black hole – and the angle at which we view them
- Stars and Galaxies | NASA Jet Propulsion Laboratory (JPL)
Our universe includes a variety of astonishing and sometimes bizarre objects Massive black holes so powerful, they swallow nearby objects Galaxies that merge into giant swirls Enormous stars that eventually explode and become supernovas Neutron stars — objects so dense, one tablespoon of their material would weigh about 1 billion tons on
- NASA SVS | NASA’s Webb Reveals Galaxy Population Driving . . .
Symbols mark the locations of young, low-mass galaxies bursting with new stars when the universe was about 800 million years old Using a filter sensitive to such galaxies, NASA’s James Webb Space Telescope imaged them with the help of a natural gravitational lens created by the massive galaxy cluster Abell 2744 In all, 83 young galaxies were found, but only the 20 shown here (white
|
|
|