Search the Kids Internet
Encyclopedia
> Timeline of knowledge about the interstellar and intergalactic medium
Article Content
Timeline of knowledge about the interstellar and intergalactic medium
Timeline
of the
interstellar medium
and
intergalactic medium[?]
1848
-
Lord Rosse[?]
studies
M1
and names it the
Crab Nebula
1864
-
William Huggins[?]
studies the
spectrum
of the
Orion Nebula
and shows that it is a cloud of gas
1927
-
Ira Bowen[?]
explains unidentified
spectral lines
from space as
forbidden transition lines
1930
-
Robert Trumpler[?]
discovers absorption by
interstellar dust
by comparing the angular sizes and brightnesses of
globular clusters
1944
-
Hendrik van de Hulst[?]
predicts the 21 cm hyperfine line of neutral interstellar
hydrogen
1951
-
H.I. Ewen[?]
and
Edward Purcell[?]
observe the 21 cm
hyperfine[?]
line of neutral interstellar hydrogen
1956
-
Lyman Spitzer[?]
predicts
coronal gas[?]
around the
Milky Way
1965
-
James Gunn[?]
and
Bruce Peterson[?]
use observations of the relatively low absorption of the blue component of the
Lyman-alpha line[?]
from
3C9[?]
to strongly constrain the density and ionization state of the intergalactic medium
1969
-
Lewis Snyder[?]
,
David Buhl[?]
,
Ben Zuckerman[?]
, and
Patrick Palmer[?]
find interstellar
formaldehyde
1970
-
Arno Penzias[?]
and
Robert Wilson[?]
find interstellar
carbon monoxide
1970
-
George Carruthers[?]
observes molecular hydrogen in space
1977
-
Christopher McKee[?]
and
Jeremiah Ostriker[?]
propose a three component theory of the interstellar medium
All Wikipedia text is available under the terms of the GNU Free Documentation License
Search Encyclopedia
Search over one million articles, find something about almost anything!
Featured Article
Fibre optic gyroscope
... optic gyroscope wikipedia.org dumped 2003-03-17 with ...