, 1880-08-29
ASTRONOMICAL.

Chicago URIEUNE olfice}, north latitude Al deg.
52n. 57s.; west longitude, 42n1. 1ss. from Wash
ington, and 5h, 50m. 30s. from Greenwich.
The subjoincd table shows the time Of rising
of the moons lower limb, and the official time
for lighting the first strcet-lamp in each cir
cult in this CITY, during the coming week, unless
ordered sooner on account Of bad weather. Also
the following times for e1tfnguish1ng tho first
lamp:
Day. Noon rises. LfGht- E:Ettng1stah
to''aay oS ss o:s: a. m. 81 80 NJ NJ. SO =. NJ m
Wcdnesday: 5:iS4 i a. NJ N: 80 5S :: F. NJ NJ. s:5o l. n
Friday 1:9:: s.: :: M: $50 1: m: $50 a. N.
Saturday. 6:ot11 P. IN. go p. m- 3:5o a. m.
Sept. &c.,. ESQ p N. G:35 p N. 4:uo Il. m.
The new moon will occur next Saturday at
11:03 Il. N. She will be near Mercury Friday
afternoon, and pass 64 degrees south from
Venus next Sunday night
The suns upper limb will rise On Monday at
5:232f Il. NJ, south at 0m. 153s. p. m., aud SEE at
6:86t4 p. m.
The sun'supper limb rises Friday next Mt 5:ee1s4
H. H., souths at lib. 5sm- 594s. a. H., and sets at
6:zolz p. m.
The sfdcreal time Thursday mean noon will be
l0:49m. 0..:e2s.
Mercury is now west of the sun; the distance
Thursday will be 12z degrees. He will south
IlH[ uNV HI n.lU a. II.
Venus is cast of the SUM- Thursday she will
south at 0:d, p. m. She is still too near the sun
to be seen without tho aid of the telescope.
Mars, also, Is too near tho sun to be of interest
to the naked-eye astronomer, though he TOR ehe)
were as skiliful rs HeycIius. The planet will
South Thursday ut l:03tS p
Jupiter will rise Wednesday at 3:G2 p. m. and
south Thursday At 2:S5 n. H. His apparent
lin1netcr Is now 45.7 seconds Of urc, about
f.1y,1o n unh aaa 81 q
mile. Iii consequence Of his great briLiancy
he appears much larger than this to the naked
eye his rays being SPREAD In passing through
our atmosphere He is very brilliant oh
jcct-bright enough to cast a shadow, when
near tho zenith, In the absence Of the moon.
At 9:35 this evening the second satellite will
begin to transit the planet, and will pass or at
0:11 Il. m. at s:46 H. m. Monday the first satel-
lite will begin transit, and will pass of at +:,o
a. m. At ll:01M p m. Monday the first will be
ccpsed un1 it Will rcappcar from occultation
t2:07 m. AT 9:l3 p. Ii. Tuesday the first will
begin transit of the planet. which will end ut
11:e5 p. III. At1:56A p nl- Friday the third sat
elite will reappear from eclipse, will PASS bc-
hind tho planet at S:57 p. M, aud re-
appear from occultation at 1lo3 p.
nj. At 4:03 Il m. Saturday the second will
be ccltpses. On Wednesday und Thursday cyen-
1ngs the third satellite will be fur enough to the
west Of the planet to permit it to be seen with
an orlinury opcra-slass. The fourth satellite
will also be near his greatest western elong,,-
tion Wednesday, Thursday, and Friday eyen-
tnss,-far enough from the planet to be seen
with the naked eye. 1t may be interesting to
many to look for these objects. They muy be
readily picked up by first looking ut Jupiter
past tho edge OF a board, or the projecting
cornicc on the southwest corner Of building,
and then move the head to the left Just far
enough to shut out the view OF the planet him.
SELF Tho fourth satellite certainly, and prob
ably the third, will then be easily recognized,
and once seen mag be kept in view in co1npc1i-
tion with the glare OF the planet. Both are
tense brightness Of their principal. Tho
luter In the evening the better will bo
tho chances OF success In looking for them. /
1t has been sud TINT not more than three or four
persons ever saw sutel!ite OF Jupiter with the |
unatded eye. The third US we'll us tho fourth Is |
not difficult VIXEN the position Is favorable and |
the person knows how to look for the object L !!
postal-card from those who succeed in seeing |
one or both this week will be welcome to tho |
astronomical department Of TIE TRIBUNE. The |
bright spot Of Jupiter will be turned directly |
towards us ut about the following times during |
this week: Monday at 12:0: p. m.; Thursday |
at AZ H.; Saturday at 3:20 m., and at u:10
p N. |
Saturn will rise "Wednesday at s:31 D. m.; aoa |
south Thursday ut J:01 IL. H., or 80 minutes after
Jupiter. Ills apparcnt equatorial diameter ia |
only ISL seconds, fo.r-tcnths that Of Jupiter:
but his ring system presents greatest diameter |
Of 1872 seconds, with q least diameter of liz I
seconds. The earth Is nov 151z degrees south |
from the plane OF the rings, giving a yery
favorable opportunity for studying them
through the telescope.
Uranus Is now with the sun; they will bo in |
conjunction Wednesday, morning,
Neptune will south Thursday ut 4:oe a. m. His
nsnt ascension then will be 2h, 4on1. 24s., and +
decAnatton II degrees "a minutes north.
I1tE editor Of the Popular Science Month";
" embraces the occasion Of the death Of severn,
Young men from malarial fever in Princeton
College to attack ferociouBly the whole theory
OF classical education Wa t1o n,+ ,,.,a:.,.