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Štoparski vodnik po... galaksijah

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Dunja Fabjan

on 14 July 2014

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Transcript of Štoparski vodnik po... galaksijah

G
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logo filma "The hitchiker's guide to the Galaxy"
Milky Way, Larry Landolfi, Fort Davis, Texas
umetniška slika Mlečne ceste, NASA/JPL-Caltech
M44, razsuta kopica jasli, Johannes Schedler
Galaksija Sombrero, NASA/Hubble Heritage Team in R. Kennicutt (Steward Obs.) et al., SSC, JPL, Caltech, NASA
nastajajoče zvezde v NGC 281, T.A. Rector/University of Alaska Anchorage and WIYN/AURA/NSF
M82 (Cigar galaxy), optical, P.Challis, Whipple Obs, Mt. Hopkins
NGC 1404, SN 2007, NASA/STScI
M81, spiralna galaksija s centralno odebelitvijo, NASA, ESA, and the Hubble Heritage Team (STScI/AURA)
M51 (Whirpool galaxy), NASA, ESA, S. Beckwith (STScI), and The Hubble Heritage Team (STScI/AURA)
NGC1300, NASA, ESA, and The Hubble Heritage Team (STScI/AURA)
NGC 6822, Local Group Galaxies Survey Team, NOAO, AURA, NSF
Stars of the Galactic Center, Susan Stolovy (SSC/Caltech) et al., JPL-Caltech, NASA
Sagittarius A*: Chandra Catches Milky Way Monster Snacking, NASA/MIT/F.Baganoff et al.
Multiwavelength Milky Way:http://mwmw.gsfc.nasa.gov/mmw_sci.html
Galaxy Cluster Abell 1689, NASA, ESA, E. Jullo (Jet Propulsion Laboratory), P. Natarajan (Yale University), and J.-P. Kneib (Laboratoire d'Astrophysique de Marseille, CNRS, France)
Hubble Ultra Deep Field, NASA, ESA, S. Beckwith (STScI) and the HUDF Team
Centaurus A, X-ray: NASA/CXC/CfA/R.Kraft et al.; Submillimeter: MPIfR/ESO/APEX/A.Weiss et al.; Optical: ESO/WFI
Millenium simulation, Springel et al. (2005)
Vrste galaksij
eliptične
e
spiralne
Kje se nahajajo "spiralne meglice"?
leta 1920 je na vrsti VELIKA DEBATA
med H. Shapleyem in H. Curtisom:
so spiralne meglice znotraj ali izven
naše Galaksije?
Edwin Hubble, 1929
Kljuc so kefeidne razdalje!
Razdalje v Vesolju
hvala!
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s prečko
vmesne
navadne
nepraviln
Barnardova galaksija, NGC 6822
Naše (nemirne) sosede
ali bliznja srecanja...
Kje smo v Vesolju?
Naša Galaksija = Mlečna cesta
You are here
v začetku 20. stoletja
nizozemski astronom J.C. Kapteyn
iz štetja števila zvezd sklepa o velikosti
naše Galaksije
po letu 1917
ameriški astronom H. Shapley
meri razporeditev kroglastih zvezdnih kopic
8500 svetlobnih let
"heliocentricni" sistem
6krat vecja Galaksija
sredisce v Strelcu
VI STE TUKAJ!
Razdalje, ki jih poznamo danes
premer Galaksije: 100.000 s.l.
razdalja med Soncem in središčem: 26.000 s.l.
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A L A K S I J E
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Sestava Galaksije
zvezde in se marsikaj
PRAH
R. Trumpler
leta 1930
meri svetlobo
razsutih zvezdnih kopic
M44, raszuta zvezdna kopica Jasli
Galaksija Sombrero, M104
PLIN
ZVEZDE
kemični elementi
NEVIDNI DEL
črna luknja
temna snov
populacije zvezd
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Galaksije v preteklosti
LBG
ULIRG
ERO
SCUBA
DLA
Aktivna galaktična jedra
SŠtoparski vodnik po... galaksijah
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Dunja Fabjan, astrofizicarka
CO Vesolje-SI in FMF, UL
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SPREHOD SKOZI VESOLJE
Full transcript