New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1874-01-23

aid other pictures will show you the immense vareu
Vn nrmher NJ these nebula IL something enormous
There many neouIa " r1aa ,yo,rras H. lore
% mimi a ront kinds of Debula You see 'ne sno
of the great nebulous mass sathe,ms n,s,a,ed how
clusters of aggregation Her-chel thus hnstra,ed no
out f The great mass OF nrenist stars might be ofne
There Won see three stars and now we VIII nav ~ r
neire In which sim other forms OF aegregatons VIII
Bon There are certain Of these nebnlous masses ~
which the form single CLUSTERS. w, n,a
nv powerful telescope the most wOndaIlu IN
a. tonud in those pebous masses. Othef pictures VIII
show you the process Of the iorhdtlo Va ,tin narts
Won see a quantity OF neDulous matter IN eci IN 70
nerinc ownrd the center. Aud now We VIII pAss W
n series OF pictures showing tue way IN & a T,oo o
nobnfus matters cling around stars anu mos arg VI
a iarrer ecale and you Will sec the neouiou' ha'lo'
apparently drawn toward the various slars. ,.roo,
Tnen you will recognize The great difference Dot"sel,
the way in which that neDuiar mass II forming anu
Lapace's theory. We shai nave the room ,no ~, t
ened for some time as ines menun and we
will nave the pictures Dronght on rapidly one aiter
another the next three or four OF them iusal"s '0
la the frat you perceive three rich stars and the nebn
ious matter there also is rich There you WIZ rscosao
the same features notice the dark spots between
the ebuar regions aDdthe stars always Ia the
part of these nebular regons and evidence OF .uo
dence of Laplace'S view of IA rotating nebuar mass.
We will have another picture, and 1t VIII DC orgn.
shape Here Is view OF neoula and the next one
taken by Laselle of the nebula differs materially
bance to the Greek letter Tue same neDula is ID the
picture by Lsce and Ina, IS 50 eha1 the same aT%s
these these masses change IN form This Of the
heavens illustrating the variation OF the different parts
OF the heavens IN brightness TINS Is me bent 5egio
in the southern heavens OF when l SAID tl.t "heh
rises the horizon the effect Is the same as rs
caused by the young moon There is IN ine aSt E rn
Argis. This is neDula which varies IN shape. and tno
star in II varies from the first TO the sixth magnitude
Here we see fresh signs of variability in space which
bears on the birth and evolution OF our system we s
me sun was once variable aud the planets were STATS o
all variations in the early history of cur system WINE
the aggre CATION was taking place the sun mo ,, he
SUI" i,ohan,e os hrghtness regular or irregular, IA
masses OF matter were aggregated INTO u. ,,.,
As the question whether the sun is hkey suuoeny
to have defaeation OF brightness consider now o
the ia brightness ANA tue thought Is suk
cess of evolution NAV be so incomplete. Careful
observations made by the English astronomer heyn t
and otheTs-a process not very much carried on III ls
countryshow that the stars vary very much IN orgh
ness but that observation must be carried on IonS
time before sure results can be obtained
VARIATIONS TAKING PLACE IN THE STELLAR HtANEhs
In the considerations, If we can imagine that there
were figures resembling the bear and the lion in shape
in the old times and If nd no traces OF theiD
idea suggested that there has been change and
was disposed 10 think this was the case foi
couldn't think the early nations could imagine
bear for instance, If there no such shape IN Ursa
Major. But by making the figure OF the animal
larger and studying the head, and as was suggested
in The OF Dick swyclleI and the Marcniobess ny
making believe a good deal we can make y ont Tue
four limbs Of the Bear are differently placed mere view
that group forming the head and there Is certain
resemblance the peculiar sout OF the head OF Bear
The stars are small, but on clear nght you Can fecos
nize "A certain resemblance TO tfc Dead.
We have here the head OF the Iion tbs ngure teing
nefs6SSrins G6nsteiee.Gds Tic sronpis Il staIs az
around gives really resemblance TO the head OF
Op, That group which have made the TAI is me con
sellaon Coma Berenics Perhaps, after all, the stars
never did vary much There enough there to make an
imaginative people think there was the figure OF non
brightness, having declined from being as bright as The
others We cannot be certain that our sun may not re-
duee ar u
once bright the rest, aud now 1t greatly reduced
This NEXT picture shows how the great nepula III Afgo
has varied Now, have ten pictures, In one OF
which the figure like keyhoe, and on the next 1t Is
greatly varied and VERIFYING Is so changed as TO chow
that the nebular Is drifting hther and thlth~r;
that the regions OF the fire INST are DRIFT
ing mass. We shall have more pictures tend
ing 10 show the disposition OF these nebulB
the heavens Theeoudets Of stars are found to be
spread with strange variation over the MILKY way,
not uniformly and that has been put IN evidence To
prove know not why that these star clOudes do not
belong TO the solar system But the diversiiy-he two
parts OF heavens diverse, filed with Debu'a,
the other with star cloudies-seem To show that there
Is connection between the parts We have
the idea that in the MiiKy Way, where
the stars are rich the circumstances we've favorable
TO the formation OF stars aud star clusters the star
where whereas outside Of il circumstances
not favorable 10 the formation OF stars aud the process
formed
Here you havea' picture showing dark region and
the nehular masses complete. Notice the northern
uebuar ana these streams coming out Here IL -
extending toward a small cluster OF nebusf The Mky
~ parate stars Iu the star clouds We hnd multitude
OF stars discernible with tine telescope and 80 closely
clustered he irresovabo, and III these MASSES or
ciOudlets we proof, have certainty, that the
sidereal system rs not mere aggregation OF
stare hut contains AL varieties, neDul9. sarcloudiets
and stars of all varieties and mat II resembles the solar
system uniformity but III variety of structure In
studying laws We have problem OF enormous am
Guilty which must one day be solved Man can
stand unsatiscd IN the presence oil sueh pfopieh
MOTIONS OF THE STARS.
Here picture showing the stars in the northern
viii heads attached.
there is hope, by comparing maps OF this nature aud
making them perfcct-there is hope Of ascertain
ing why these move this way and these this way, and
Of determining the IL which they arose. and what
was the nature of the scheme of which the present
universe sprung.
You viii notice those OF the northern stars with their
little star ON the next map you Will see those
of the Southern Hemisphere. IL Is matter Of great
hope that here ia America map OF the exact positions
the stars is being made 50 that hundred years hence
All ese motion. can be detected. This lie noble work
the real value OF which Will only pe known hundred
hence and MS promoters deserve great deal OF
Now wish to bring before you a series of pictures
showing somewhat better scale, the appearance Of
that chart of many stars which shown at the last
lecture. IL the beginning OF the third process. the
process OF stargauging. The picture now before you
tie central par of that chart of many stars
The central one is the Polar star In the lower part
region OF greater brightness, and IN The next
Wav Is clearly Indicated In the next, IA
upper part there is much greater brightness Cas-
this Oh the right the Pieiades and the clus
in the sword hand OF Perseus, aud tue Milky Way
going from the upper right hand to the left baud
And then there Is that dark region Of which have
spoken. The next picture will naturally be OF the
Twins You have again.the Milky Way. Here Is the
constellation Of the Dog and the two Twin STAR,
and now coming 10 the region where
the stars fewer. In the next PIC
ture we begin to approach the MilEy
Way again. We have nearly round the heavens
One other picture carries 10 the richest part Of the
Milky Way and the constellation OF the Swan. We
the rch gathering OF stars IN that constellation Now
we will have the whole picture Of the northern heavens
again shown not the one, and you will how
the Milky Way is mapped out by these stars. You can
see the Milky Way carried right round that picture.
You DE gin to evidence have that the Milky
Way a stream Of stars gathering together large and
small We see it a spiral, II we're. Looking at IL
10 that way, begin 10 recognize how the
pebu formed 1t; how