Evening star. [volume] (Washington, D.C.) 1854-1972, 1901-01-05

| to say, revolving one about the other.
Trey range in order from nairs eos,1,,
separated with small telescope the COM
ponents OF which are decades or even con-
do,,S1 III performing one revolution-the
uoupie star Castor is an excellent examnis
OF systems of this classic pairs of $50
SO ciose mat their revolution is performad
~ d lew DAYS or a few hours and their
bv Thy SSmiairae.er mas been discovered only
~ .he uellcate method Of the spectroscons
IHlHdE, tne middle star in the handle of the
Ereat Upper was the first discovered nf
mes, ,nese spectroscopic binaries. at the Har-
Io4 days. Beta Aurigae the secnna',,,o 40
I m star In the right shoulder of TIE
WAGNER. was the next to be detac,as
i los period is only four days Within the
,ast Two years the number of spectrosconio
olharles In several of which one Of ~
eonponents is a dark body. has bean
greatly enlarged, notably by Professor
painl pi' at the Lick observatory The
III, d.. mas been found by this astrono-
mer to be triple one of the romnorono.
eeilg dark body. Capella also has baan
aouna 70 be spectroscopically binary. with
a period OF 104 days The comno,art.
have about equal mass, and each :, ,ii,,
ANY vastly larger than the SIM COW
putatlon shows that they cannot ba L.,
man man ooooooo0 miles apart, and the fact
tnat a recent attempt to senaratn th,s
usually with the great Lick teIescona III
unsuccessful Is calculated to give nc %
iNeiy impression of the enormous remote.
NA>7S VI tLlS DTlllldnt star
The PlanetOfd Eros.
Inc track of the minor planet Eros in
the heavens from June 1 to the end If mi.
month is shown on our chart. This ti,v
CELESTIAL was at its nearest to the earth In
'he latter part Of last month, when for
several days its distance was apnroxt
nlately 29UoOooO miles. and it appeared
as star of about the ninth magnitude
Eros has been carefully observed ar ali
OF the principal observatories that arc
iaVorably situated since last October for
ras PURPOSE OF determining with the utmost
possible accuracy it's distance from us.
ana thus obtaining new determination Of
the suns distance w.
Minima of Algol,
NO minimum of Algol at a favorable hour
VIII occur until the Goth of the month.
when the star will begin to wane at about
pm, and will be at its faintest at IL pm.
Another minimum will occur on the 30.
at pm. This star, ordinarily of the Sec
ond magnitude, at intervals of a little under
t ,nree days Tails in the space of about four
ncurs TO near the fourth magnitude and in
the next four hours RECEIVERS its brightness
the cause of the change being the revolu-
tion round 1t OF dark companion. which.
passing periodically between it and us.
cuts off portion of it's light.
The Planets.
Mercury will be a morning star in tha
early part Of the month, and an evening
star in the latter part. but 1t will not be
observable owing to its proximity to the
sum-
Venus is morning star, rising in the
early part of the month, at about ) am
In the southeast.
Mars is an evening star, near the east
ern border Of Leo, rising now at about $50
pm.
Jupiter Saturn and Uranus are now
morning stars, but are too close to the sun
to be observable. Neptune is the only
planet now above the horizon at pm,
near the western border of Gemini, but in
visible to the naked eye. being of less than
the seventh magnitude