New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1874-01-21

spectra OF about COO. part Of them OF ;h
nature, iherent from, but with the rslhu"N
tinted streak The spectrum IL interesting W , , h
respect that this characteristic spect , leading "rder
the star Sirius, showngit "a belong 10 toa' eaus &
distinguished from sin IN that way snu ~ Nv n,x
ma fHr line. The upper
which should be very bright u1e T nss q" hydrogen
which show that they have an atmosphere Vi pfc"'
depth Of ny drogen , 4. - ,v,r, y. ,,o,r |
atmosphere that extends farthest We may assume tnas
the ingredients OF the other parts o, tns that
owing their greater size they have very deeP a'oe
The nert spectrum is the spectrum of the stars that
seen to resemble our Many stars give that spec
trum and some OF them are ,le eaa'ng , sI " We
pass another spectrum ON TINS third me- VIM
and Father Secchi SAYS bands resemble the spec
rum of the suns spots, and he SAYS that INC stas
which present those spots really covered with spots
II is a noteworthy fact that among the starr |
giving that spectrum there are some , "l ,np
Mira fCetD which sometimes shines a second maGn-
tude then SINKS down until altogether nvsinC'
Other are noted for their rud1y color ana ai.o
eether the idea suggested that seech right ana W.
have To deal with stars which, for some r.S"n OF
other, covered with great nuinOer o s.Ss'
th- work Secc only the beginning OF TINS stuuy
aud pass next TO the work accomplished py Dr; mug
guns and Dr. Miller. Miller and HugSins catrion On a.,
KIND of work much more exact tnah recn'' anu no
eontented with his treatment Of the lines they compared
the different lines with tdose belonging 10 certain pa
tcar chemical elements You VIII ree tnat III ths new
by Hucgins with these lines belonging to particular
elements sodium, magnesium. iron. Dlsinnth antnOny
a.. IL :
sphere OF a star millions Of miles away, aud WAT
the astronomer tell That as certainly as uouR ne
could bring portion OF inc IRON lhlo HIS s'""S avn IN
WELL now. you begin 20 recognize the faet mat sec
CHRIS ANALYSIS s "A means of determining not merely
there ut certain elements IN the STAR put t'
they exist 81 certain conditions When we cL@nlhe .he
spectrum at the 1ctcgeuN, we viii hnd thd' u"
lines Of hydrogen arc wanting. although they are
bright then find that there are other STAR ~hce
tho lines hydrogen bright. showing hat the hydro
gen exists in a somewhat more heated STATE Ihcic Wa
a star apprared m 'sGCa telescope starvhicb flashed
into view aud rose second magnitude; and when
thai examined. during ls greaio, bfli'su3 VI "as
found that on a ralnbow.drliled streak forming ls
spectrum there we're lines OF brightness, OF glowing
rpr LIGHT OF CoIoRED STARS.
And now We will pass ~ lis application 20 another
Interesting feature OF stellar electromagnetic case,
meat OF the coored double stars Among the stars In
| the heavens there some that when examined by
good telescopes found Ia be double ana snow very
well marked colors. red some orange and some
blue and 20 on and Tue question SUGGEST l'tI Is tt
color ia the starlight. or Produced bv the cut
uug of OF portion Of the stars ght ny Val"r lake
thc familiar case OF light used at the tbcatcr. There
have fire like particular color, an ah>0lutc$ IN
hcrcnt color but then You may also nave 'o"red kht
nrniured in another way. TOu nave an ordinary
uhitc hight and puj IT before colored glass, There are
amater eXccednC interest 10 determine ny Wha way
colorcd have their color gwen tnom We VIII nave
done by the ,pecrosc"pe In the next picture We nave
the spectrd of the component stars oI lie srlehui
double star Cygn IL has two componcns, one ur-
pie and the other orange. and those Two STARS nave
sprctra spending TO the two shown The purple
| star mas spectrum in which there are hummer OF
hands opposite the orange yellow parts oi the sptctrd,
ana bauGs cut of part Of the orange light lhry
leave nperab undauce of the violet. purple portion,
and therefore the star looks like nluc star Inc yellow
~ar strong lines 81 blne color buy there
,uprrabdaucc Of orange, yellow lines, thar she star
,hows star. Thus we earn tnat TIE cOored
stars least N tnat instance, ana PROBABLY III others
I owe their colors to the inherent nature of
| their inner light. but 10 me qnhiues oil ihc
] envelopes that surround them aud the il'd
I j. suggested that we have there "A process
~ w.Tn II is ony the smaller ccmp"ncnts of me
| double that show The blue or purple color; aud
of our stellar ~ sein history, Jupiter or Saturn may
! have been visible accompanying stars. small compile
| shown Semarked colur> by comparison with ms
NEBrLE.
| We pass tonight to other objects in the stellar
heavens called the nebulT. or starclOnds. We will
have various pictures of those the screen. There
| several a. pictured by Hsr.chel. You notice the
various kinds OF aggregation Of stellar clusters and
group, IA this picture. CA the right hind part Is
glorious cluster of cluster OF suns glorious
1 our Own. aud If around one OF those suns OF that
l rlu.ter there we're worlds cirrng, the in
| bapittnts OF these world, would have
! sun, would DE setting and rising, aud the whole SKY
would covered with Them Those people would never
ne DS"nC .lJ Iir InDrh fh1t lie, bpvond insi n, ne
Inn hides the souc, Of greater than lac and
gN''''I , ~, tic ,.r~..y, i,r and so II uu.t br Gf
There po inhabited worlds m clusters such as thaO Win
,', % mined Sy the ,pleudors around HON. We
ucat I.s 10 the larger pictures ot hos neDui which
show The great variety q 7uch maj tAi-ls. Iflc l. q
qncuce Of its resemblance 10 dumbhcll. You
have Oh the lower right hand view ct 1t on larger
scale. and IN the left YOU nave view optdnh Nv 'ans
oi M great Ro-,e telescope. telescope when doc. not
define 80 we'll a. tbat IN the Camhildse op-'I'atI'
hut set perhaps is better ,uitd "a "turf 'ePttt, "f
ob-.rtu. utbuls. You VIII have next another pf.HIc
brought on caowiuEa different appearance from that
OF ihe screen 1on VIII nave great 'piId hcui,
M -r.n from EJssC OhscrVdtOrt, and not Indicating
AL the enormous extension ~ The nchula You see
There pEocs- - though some great fuihl4 OF nom
ou- ma,,,r lad doated in with 'grai motion, travel
ng through sting medium, ana DO approaching Tho
center tras'ea ON 'llia '0uIro OnI 1i9eh, ~
refer. 20 that Was That II was mHtlrr al s4au
j. auoiher dG,r picture OF the great Orion ncbJlJ,
| which Ass been compared 20 the NOUN of some
Ionu Her. hei with a. his fathers telescope hat
he -ed the Cape Of Good Hope and 10 show the e
feet produced different telescopes ~ the app drauCc
fucbua. all nave thaJ picture removed ana place
another picture Of le aape nebua on the screen. the
tpt ~ me-, Ssre mention iha ,,rs,iorv M tie rfrc
tol u CluIld-c 20 tbe itps-e telescope. ard me
oy@,ic, b., means OF a tcc-corc to DE hvc fr,t In
apeltUrC, which II j. salQ your Optlctu, AyU tlYrk,
propose. 70 make at cost, believe oi s00o,1 That
amount sill J' wanted. II ,eens con7idcftolr -un.
a. au opiican Cooke OF ENGLAND the Ouiy opt.au
gnr,u,f,.5e ,,tn nm hui Nr Cooke j. dead have
never mad opportunity of making any com
par',on between tno great telescope Of Cooke. -
inches "A diameter. Enicn is used IN an inferior
tuc- hrre. md completed iu the hands OF ms
cc,.ol aud those of Clarke. The telescope al Washington
:, 20 uc-e, Do aperture But no" that Cooke j. away,
Clark. b, the greatest of uvluS opticians, ana D. tel
.sco,r b, Ia made 10 bee hoped h. may spared
fu ma kc L. Another picture a. now brought the
>rrrr-OrOn urhult. You see these IRE guitar starry
clouds They nyea spectrum altogether different IN
character from iLt 'pcctrHm gwen ny ,i clouds con
: sim. OF separate ,t",. These last give rainbow
tinted spectrum showing th2 consist OF suus
ming oIY structure. Iiu- ucbUlF the !
srtl s 90 ed fht true lover: Enoli NebulI such -
tnat give -Pectrt Indications OF the gaelety OF !
these he source ~ USut Ihcy spread through all |
wonderful depths OF space. EhcnDtr theIr distance
from - t the len gh Df the earth~ Ort 10y which IL
measured, ae move the diameter OF that orbit As
...pg mites Compared with the stars distance the
IL ---. - Il mi. ~ Ir.L-L -LIl-1Ll -.