Spiral galaxy - Wikipedia
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae [1] and, as such, form part of the Hubble sequence. Most spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge.
The Spiral Nebulae and the Great Debate | Astronomy 801: …
The discovery that the spiral nebulae are other galaxies similar to the Milky Way again caused a large shift in our understanding of the Universe and our place in it. For example, prior to Hubble's discovery, Shapley believed that the Universe was filled almost entirely by the Milky Way.
APOD: 2020 August 21 - Unwinding M51
Explanation: The arms of a grand design spiral galaxy 60,000 light-years across are unwound in this digital transformation of the magnificent 2005 Hubble Space Telescope portrait of M51. In fact, M51 is one of the original spiral nebulae, its winding arms described by a mathematical curve known as a logarithmic spiral , a spiral whose ...
Andromeda Galaxy - Wikipedia
The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224.
Messier 83 (The Southern Pinwheel) - NASA Science
A photogenic and favorite target for amateur astronomers, the full beauty of nearby spiral galaxy M83, also known as the Southern Pinwheel, is unveiled in all of its glory in this Hubble Space Telescope mosaic image. The vibrant magentas and blues reveal the …
Anniversary of Edwin Hubble’s Great Discovery - NASA
2013年12月31日 · On December 30, 1924, astronomer Edwin P. Hubble (1889-1953) announced his discovery of the spiral nebula Andromeda, proving for the first time that our own Milky Way was but one of many galaxies in the vast universe.
APOD: 2023 March 22 – M31: The Andromeda Galaxy
The most distant object easily visible to the unaided eye is M31, the great Andromeda Galaxy, over two million light-years away. Without a telescope, even this immense spiral galaxy appears as an unremarkable, faint, nebulous cloud in the constellation Andromeda.
Webb telescope spies millions of stars in stunning spiral galaxies | CNN
2024年2月2日 · The James Webb Space Telescope has captured scintillating images of 19 spiral galaxies — and the millions of stars that call them home — in unprecedented detail never seen before by astronomers.
An extraordinary celestial spiral - ESA/Hubble
2010年9月6日 · An extraordinary celestial spiral. This remarkable picture from the Advanced Camera for Surveys on the NASA/ESA Hubble Space Telescope shows one of the most perfect geometrical forms created in space. It captures the formation of an unusual pre-planetary nebula, known as IRAS 23166+1655, around the star LL Pegasi (also known as AFGL 3068) in ...
NASA's Hubble Sees a Stellar Volcano | HubbleSite
4 天之前 · R Aquarii (WFC3 Image) NASA's Hubble Space Telescope has provided a dramatic and colorful close-up look at one of the most rambunctious stars in our galaxy, weaving a huge spiral pattern among the stars. Located approximately 700 light-years away, a binary star system called R Aquarii undergoes violent eruptions that blast out huge filaments of ...