Timeline of knowledge about the interstellar and intergalactic medium (1681 bytes)
1: ...f the [[interstellar medium]] and [[intergalactic medium]]'''
3: ...osse]] studies [[Messier object|M1]] and names it the [[Crab Nebula]]
4: ...the [[Orion Nebula]] and shows that it is a cloud of gas
6: ...] by comparing the angular sizes and brightnesses of [[globular cluster]]s
7: ...he [[21 cm line|21 cm hyperfine line]] of neutral interstellar [[hydrogen]]

Interstellar medium (2225 bytes)
1: ...onsists of about 99% gas particles and usually 1% of dust.
3: ...meter. Generally the gas is roughly 90% hydrogen and 10% helium, with additional elements ("[[metals]]...
5: ...extinction is caused by refraction and absorption of photons in certain wavelengths.
7: ...rom a star, because most of it is absorbed during the trip to Earth by Lyman-alpha absorption.
9: ...ative proportions of the phases is still a matter of considerable contention in scientific circles.

Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure (5914 bytes)
1: ...ers of galaxies]], and [[large-scale structure of the cosmos]]'''
3: ...tronomer]] makes the first preserved recording of the [[Large Magellanic Cloud]].
4: * [[1521]] - [[Ferdinand Magellan]] observes the [[Magellanic Clouds]] during his circumnavigating...
5: ... on the [[sky]], the "[[Milky Way]]", is composed of many faint [[star]]s,
6: ...]] discusses [[galaxy|galaxies]] and the shape of the Milky Way,

Intergalactic space (540 bytes)
1: ...than one atom per cubic meter. The primary method of energy transfer in intersteller space is by [[rad...
4: ...es.com/p/articles/mi_m1134/is_n1_v107/ai_20517887 Intergalactic Space], Natural History, Feb 1998
6: [[Category:Large-scale structure of the cosmos]]

Intergalactic travel (154 bytes)
1: ...en galaxies, and it is even more difficult than [[Interstellar travel]]

Intergalactic Wanderer (983 bytes)
1: ...rgalactic globular cluster barely in orbit around the Milky Way.

Intergalactic Sonic 7’’s (4649 bytes)
2: ...ign="center" bgcolor="darkseagreen" colspan="3"|''Intergalactic Sonic 7’’s''
4: |align="center" colspan="3"|[[Image:Intergalactic_Sonic_7s_Album_Cover.jpg|Album cover]]
6: ...record|quadruple disc vinyl LP]] Album by [[Ash (band)|Ash]]
25: ...colspan="2" valign="top"|(see personnel at bottom of page)
27: !bgcolor="darkseagreen" colspan="3"|Professional reviews

Zen Intergalactic Ninja (348 bytes)
1: '''Zen Intergalactic Ninja''' is a [[NES]] and [[Game Boy]]-game made by [[Konami]] released in ...
3: ...as made by [[K. Nakamura]] and has been played on the Swedish radio-channel P3's programme [[Syntax Err...

Intergalactic Banking Clan (814 bytes)
1: ... powerful [[hailfire droid]] that was used during the [[Clone Wars]].
3: ...epublic]] battle to take that planet was shown in the ''[[Star Wars:Clone Wars]]'' microseries on [[Car...

Interstellar ark (2588 bytes)
1: ...icle may be the most economically feasible method of traveling such distances.
3: An interstellar ark could be either a [[generation ship]] or a [[sleeper ship]].
7: ... be large enough to host a city of a hundred thousand or more people.
9: ...Alpha Centauri]], further issues of the viability of such arks include:
11: ...rastically evolving in directions unacceptable to the sponsors

Interstellar planet (2491 bytes)
1: ...[[gas giant]] to become an outcast, drifting in [[interstellar space]].
3: ==Theoretical ideas on the atmospheres of interstellar exoplanets==
5: ...essure-induced far [[infrared]] radiation opacity of a thick [[hydrogen]]-containing atmosphere.
7: ...[[star]], the planet's predominantly [[hydrogen]] and [[helium]] containing atmosphere would be easily ...
9: ...ion emissions emanating from the lower reaches of the atmosphere.

Interstellar communication (4406 bytes)
1: ... in that regard it is currently not known whether interstellar communication is possible at this time.
5: ...try]] (see [[carbon chauvinism]] for a discussion of potential alternatives).
7: ...le Green Men." They were quickly determined to be of natural origin, however.
9: ...30,000 [[light year]]s from our [[solar system]]. These efforts have been more symbolic than anything e...
11: ==Other methods==

Interstellar cloud (2798 bytes)
1: ... different composition from the household meaning of dust.
3: ...light stripping electrons from atoms and exciting them - producing a characteristic nebular glow.]]
7: ...ny elements, whose spectra can be seen in visible and ultraviolet light.
9: ... cloud. The height of the peak is proportional to the relative percentage that it makes up.
11: ==Unexpected chemicals detected in interstellar clouds==

Interstellar Discussion (1446 bytes)
2: '''Interstellar Discussion'''</td></tr></table>
4: ...'''Interstellar Discussion''''' is an album by [[Jandek]] (1984), released by [[Corwood Industries]] (r...
9: #"Why Did I Change a Word in the Last Song"
11: #"Call You the Sun"
13: #"The Spirit"

Interstellar travel (11432 bytes)
1: ...r travel and [[interplanetary travel]], mainly in the distances involved.
3: ...us scientists, science fiction authors, hobbyists and enthusiasts.
5: ...or several years, and has accumulated a number of theoretical approaches.
7: ==The difficulty of interstellar travel==
9: ...el poses a number of difficulties. There are all the

Interstellar Concordium (ISC) (6135 bytes)
1: ...imilar to the [[Federation]], beyond the [[Gorn]] and [[Romulan]] empires.
3: ...s a reference point for those unfamiliar with the Interstellar Concordium.''
5: ==ISC Culture and Society==
7: ...ns]], the [[Korlivar]] and (in Starfleet Command) the [[Meskeen]].
9: ==ISC Technology and Tactics==

Interstellar Network News (2395 bytes)
1: ...the [[Babylon 5]] universe. ISN´s motto is ''ISN. The Galaxy´s Most Important Network.''
3: ..., all the Earth Alliance colonies, Babylon 5 and other alien worlds. By 2260 ISN had won six Platinum N...
5: ...n transmitters mostly supplied by the government, the network was extremely vulnerable to government pr...
7: ...med by elite military forces and the network went off air for several weeks.
9: ...atant propaganda, Babylon 5 launched the Voice of the Resistance.

Diffuse interstellar band (485 bytes)
1: ...en, in [[ultraviolet]], [[visible light|visible]] and [[infrared]] wavelengths.
3: The origin of DIBs was unknown and hotly disputed for many years, but seems likely t...

Local Interstellar Cloud (769 bytes)
1: ...sphere]] at [[Standard conditions for temperature and pressure|STP]] has 2.68845625 × 10¹⁹ m...
11: ...dlines/y2004/17dec_heliumstream.htm A Breeze from the Stars]. Retrieved 05:16, Dec 23, 2004 (UTC).

List of molecules in interstellar space (7780 bytes)
1: ...ine the [[Electromagnetic spectrum|spectra]] of [[interstellar cloud]]s.
122: |[[Thioformyl]] [[cation]]
219: |[[Thioformaldehyde]]
395: |[[Dimethyl Ether]]
455: ...nrao.edu/~awootten/allmols.html NRAO Interstellar and Circumstellar Molecules]

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