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The Virgo Cluster of Galaxie
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| Title |
The Virgo Cluster of Galaxies |
| Explanation |
Pictured are several galaxies of the Virgo Cluster, the closest cluster of galaxies [ http://www.astr.ua.edu/white/mug/cluster/clusters.html ] to our Milky Way Galaxy [ http://antwrp.gsfc.nasa.gov/apod/ap990224.html ]. The Virgo Cluster [ http://www.seds.org/messier/more/virgo.html ] spans more than 5 degrees on the sky - about 10 times the angle made by a full Moon [ http://antwrp.gsfc.nasa.gov/apod/ap991108.html ]. It contains over 100 galaxies of many types - including spirals [ http://antwrp.gsfc.nasa.gov/apod/spiral_galaxies.html ], ellipticals [ http://antwrp.gsfc.nasa.gov/apod/elliptical_galaxies.html ], and irregular [ http://www.seds.org/messier/irre.html ] galaxies. The Virgo Cluster [ http://www.astr.ua.edu/white/mug/cluster/virgo.html ] is so massive that it is noticeably pulling our Galaxy toward it. The cluster contains not only galaxies filled with stars but also gas so hot [ http://antwrp.gsfc.nasa.gov/apod/ap960419.html ] it glows in X-rays [ http://www.optonline.com/comptons/ceo/05250_A.html ]. Motions of galaxies in and around clusters indicate that they contain more dark matter [ http://cfpa.berkeley.edu/darkmat/dm.html ] than any visible matter we can see. Notable bright galaxies in the Virgo Cluster include bright Messier objects [ http://antwrp.gsfc.nasa.gov/apod/messier.html ] such as M61 [ http://antwrp.gsfc.nasa.gov/apod/ap980922.html ], M87 [ http://antwrp.gsfc.nasa.gov/apod/ap950913.html ], M90 [ http://antwrp.gsfc.nasa.gov/apod/ap960316.html ], and M100 [ http://antwrp.gsfc.nasa.gov/apod/ap980606.html ]. |
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Visitors' Galaxy Gallery
| Title |
Visitors' Galaxy Gallery |
| Explanation |
A tantalizing assortment of island universes [ http://www.astr.ua.edu/goodies/data_resources/ galaxies.text ] is assembled here. From top left to bottom right are the lovely but distant galaxies M61 [ http://www.noao.edu/outreach/aop/observers/m61.html ], NGC 4449 [ http://www.noao.edu/outreach/aop/observers/n4449.html ], NGC 4725 [ http://www.noao.edu/outreach/aop/observers/n4725.html ], NGC 5068 [ http://www.noao.edu/outreach/aop/observers/n5068.html ], NGC 5247 [ http://www.noao.edu/outreach/aop/observers/n5247.html ], and NGC 5775/5774 [ http://www.noao.edu/outreach/aop/observers/n5775.html ]. Most are spiral galaxies [ http://antwrp.gsfc.nasa.gov/apod/ap000908.html ] more or less like our own Milky Way [ http://csep1.phy.ornl.gov/guidry/violence/ galaxies-info.html ]. The color images reveal distinct pink patches marking the glowing hydrogen gas clouds in star forming regions along the graceful spiral arms. While Virgo cluster [ http://antwrp.gsfc.nasa.gov/apod/ap010126.html ] galaxy M61 is perhaps the most striking of these spirals, the interesting galaxy pair [ http://www.astr.ua.edu/pairs2.html ] NGC 5775/5774 neatly contrasts the characteristic spiral edge-on and face-on appearance. The one exception to this parade [ http://www.astronomynook.com/galaxy_types.htm ] of photogenic spiral galaxies is the small and relatively close irregular galaxy NGC 4449 (top middle). Similar to the Large Magellanic Cloud [ http://antwrp.gsfc.nasa.gov/apod/ap980124.html ], companion galaxy to the Milky Way, NGC 4449 also sports young blue star clusters and pink star forming regions. All the galaxies in this gallery [ http://www.noao.edu/outreach/aop/observers/galaxy.html ] were imaged with a small (16 inch diameter) reflecting telescope and digital camera by public participants in the Kitt Peak National Observatory Visitor Center's Advanced Observing Program [ http://www.noao.edu/noao/pio/pop/advanced/ advanced.html ]. |
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M61: Virgo Spiral Galaxy
| Title |
M61: Virgo Spiral Galaxy |
| Explanation |
M61 is a barred spiral galaxy located in the nearby Virgo Cluster of Galaxies [ http://www.seds.org/messier/more/virgo_gal.html ]. Visible in M61 [ http://www.seds.org/messier/m/m061.html ] are a host of features common to spiral galaxies [ http://www.astro.princeton.edu/~frei/catalog.htm ]: bright spiral arms [ http://www.astronomy.ohio-state.edu/~pogge/Ast162/Wi97/Unit4/spirals.html ], a central bar [ http://antwrp.gsfc.nasa.gov/apod/ap970519.html ], dust lanes [ http://antwrp.gsfc.nasa.gov/apod/ap980116.html ], and bright knots of stars. M61 [ http://crux.astr.ua.edu/gifimages/m61r.html ], also known as NGC 4303 [ http://www.astro.princeton.edu/~frei/Gcat_htm/Sub_sel/gal_4303.htm ], in similar to our own Milky Way Galaxy [ http://antwrp.gsfc.nasa.gov/apod/ap971229.html ]. M61 was discovered by telescope in 1779 twice on the same day, but one observer initially mistook the galaxy for a comet. Light from M61 [ http://siggy.iusb.edu/netah/messier/mess-pict/pages/m061.html ] takes about 60 million years to reach us. Recent observations of M61 have detected unpredicted high velocity gas [ http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1996ApJ...472L..77B&db_key=AST&nosetcookie=1&high=33613e8e5802351 ] moving in its halo. |
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Visitors' Galaxy Gallery
| Title |
Visitors' Galaxy Gallery |
| Explanation |
A tantalizing assortment of island universes [ http://www.astr.ua.edu/goodies/data_resources/ galaxies.text ] is assembled here. From top left to bottom right are the lovely but distant galaxies M61 [ http://www.noao.edu/outreach/aop/observers/m61.html ], NGC 4449 [ http://www.noao.edu/outreach/aop/observers/n4449.html ], NGC 4725 [ http://www.noao.edu/outreach/aop/observers/n4725.html ], NGC 5068 [ http://www.noao.edu/outreach/aop/observers/n5068.html ], NGC 5247 [ http://www.noao.edu/outreach/aop/observers/n5247.html ], and NGC 5775/5774 [ http://www.noao.edu/outreach/aop/observers/n5775.html ]. Most are spiral galaxies more or less like our [ http://antwrp.gsfc.nasa.gov/apod/ap040701.html ] own Milky Way [ http://www.anzwers.org/free/universe/galaxy.html ]. The color images reveal distinct pink patches marking the glowing hydrogen gas clouds in star forming regions along the graceful spiral arms. While Virgo cluster [ http://www.anzwers.org/free/universe/galgrps/ vir.html ] galaxy M61 is perhaps the most striking of these spirals, the interesting galaxy pair [ http://www.astr.ua.edu/pairs2.html ] NGC 5775/5774 neatly contrasts the characteristic spiral edge-on and face-on appearance. The one exception to this parade [ http://www.astronomynook.com/galaxy_types.htm ] of photogenic spiral galaxies is the small and relatively close irregular galaxy NGC 4449 (top middle). Similar to the Large Magellanic Cloud [ http://antwrp.gsfc.nasa.gov/apod/ap040902.html ], companion galaxy to the Milky Way, NGC 4449 also sports young blue star clusters and pink star forming regions. All the galaxies in this gallery [ http://www.noao.edu/outreach/aop/observers/galaxy.html ] were imaged with a small (16 inch diameter) reflecting telescope and digital camera by public participants in the Kitt Peak National Observatory Visitor Center's Advanced Observing Program [ http://www.noao.edu/noao/pio/pop/advanced/ advanced.html ]. |
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Astronaut Alan Shepard on fl
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| Title |
Astronaut Alan Shepard on flight line with F-106 aircraft |
| Description |
Astronaut Alan Shepard pictured on the flight line entering a F-106 aircraft. |
| Date |
01.01.1961 |
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Astronaut John Glenn and new
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| Title |
Astronaut John Glenn and news media representatives during tour of Cape |
| Description |
Astronaut John Glenn and news media representatives during press conference and spacecraft familiarization tour of Cape Canaveral, Florida. |
| Date |
01.21.1961 |
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Astronaut John Glenn in the
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| Title |
Astronaut John Glenn in the cockpit of a T-106 |
| Description |
Astronaut John H. Glenn in the cockpit of a T-106. |
| Date |
01.10.1961 |
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Astronaut John Glenn, suited
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| Title |
Astronaut John Glenn, suited, during altitude chamber test |
| Description |
Astronaut John Glenn, suited with hose to suit ventilation unit attached, during altitude chamber test. He is standing in the entrance to the test chamber with his helmet visor down. |
| Date |
04.06.1961 |
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Astronaut M. Scott Carpenter
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| Title |
Astronaut M. Scott Carpenter in the cockpit of a T-106 |
| Description |
Astronaut M. Scott Carpenter in the cockpit of a T-106. |
| Date |
01.10.1961 |
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| General Description |
M61-0150 (1961) --- Astronaut John H. Glenn Jr., suited with hose to suit ventilation unit attached, during altitude chamber test. He is standing in the entrance to the test chamber with his helmet visor down. |
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Astronaut John Glenn in the
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| Title |
Astronaut John Glenn in the cockpit of a T-106 |
| Description |
Astronaut John H. Glenn in the cockpit of a T-106. |
| Date Taken |
1961-01-10 |
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Astronaut John Glenn, suited
…
| Title |
Astronaut John Glenn, suited, during altitude chamber test |
| Description |
Astronaut John Glenn, suited with hose to suit ventilation unit attached, during altitude chamber test. He is standing in the entrance to the test chamber with his helmet visor down. |
| Date Taken |
1961-04-06 |
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Astronaut John Glenn and new
…
| Title |
Astronaut John Glenn and news media representatives during tour of Cape |
| Description |
Astronaut John Glenn and news media representatives during press conference and spacecraft familiarization tour of Cape Canaveral, Florida. |
| Date Taken |
1961-01-21 |
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Astronaut M. Scott Carpenter
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| Title |
Astronaut M. Scott Carpenter in the cockpit of a T-106 |
| Description |
Astronaut M. Scott Carpenter in the cockpit of a T-106. |
| Date Taken |
1961-01-10 |
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Astronaut Alan Shepard on fl
…
| Title |
Astronaut Alan Shepard on flight line with F-106 aircraft |
| Description |
Astronaut Alan Shepard pictured on the flight line entering a F-106 aircraft. |
| Date Taken |
1961-01-01 |
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