The morning call. [volume] (San Francisco [Calif.]) 1878-1895, 1893-05-22
JUPITER'S FIFTH MOON,

ton is less complex than it really appears
at first sight to the laty.
JUPITER'S FIFTH MOON.
When Professor E. E. Barnard, the bril-
liant young star-gaZer at the Lick Observa-
tory, located another JupIterian satellite
last September he not only conferred a
great favor upon Jupiter himself, but
brought California prominently before the
world in matters pertaining to astronom-
zeal science.
The moon discovered by Mr.. Barnard
was only small one, less than 100 miles in
diameter. but it had been lost for countless
ages. 1t belonged TO the planet Jupiter,
being his fifth, but it had been out CT the
family so long Jupiter could not recall its
features when the professor restored the
wanderer to the fold.
However. as Jupiter had four other fol-
lowers tagging him all the time he man.
aged to worry along without the straggler
Still. the recovery OF the estray satellite
without the aid of printed or verbal
descriptions. advertisements, rewards or
celestial notice was great feather in the
cap of the young astron omer. 1t made
him famous.
AT the same time his success was severe
blow to older and presumably wiser sky
gaZers who had been chasing comets and
things for years with bigger telescopes
than the one through which Mr.. Barnard
peeped from the starry summit of Mount
Hamilton one night early in September
last. His name was telegraphed all over
the world, and he received many flattering
personals in the newspapers.
1t is also supposed he incurred the ever
lasting gratitude of Jupiter, though MOTH
ing definite has been heard from that
source.
Not long after his discovery of the new
moon the regents of the University of CAL
ifornla granted Mr.. Barnard vacation.
Men need rest and recreation after the &C.
compllshment of great work of this
nature, and the regents wisely saw the
necessity for this action.
Discovering moons is laborious work,
and few men succeed at it, But the sue
cess Of Mr.. Barnard was of the most fiat
teriag nature and such as to secure him
offers at an increase of pay.
Chicago is envious. She wants another
moon and is building a monster telescope
with which to locate one and claim it, She
also wants man who knows his business
to peek through the small end, and has
offered Mr.. Barnard the job.
He left some time ago on a trip to Eu
rope. and when he comes back he NAV go
hunting moons for the Chicago scientists
and thereby bring them fame.
Mr.. Barnard had name as q finder and
locator of comets before he came here. He
came from the Vanderbilt College Oh
| or Mo-
Lick Observatory he has done more comet
work. has perfected himself In stellar
photography, and finally he made a ten
strike, so far as fame goes, in picking I'D
the tiny moon that has for centuries been
revolving around Jupiter without astron-
omers guessing its presence.
| How he found the moon Is herewith
given in his own words. shortly after tn 1t
celebrated astronomical occurrence:
Friday being my night with the 36-inch
telescope, after measuring Mars and OBJ
serving the position of his satellites, be-
gan an examination of the region imme-
diately about the planet Jupiter.
AT II O'Clock, as near as may be, to
within few minutes. | detected a tiny
point of light close following the planet
and near the third satellite, which was
approaching transit.
Il Immediately suspected 1t was an un-
known satellite, and at once began meas
uring its position, angle aud distance from
the third satellite. On the spur of the no.
ment this seemed the only method of Sc
curing position of the new object for
upon bringing the slightest trace Of the
planet in the field the little point of light
was instantly lost.
Il got two sets Of distances and one Sc,
OF position angles and then attempted ia
refer it to Jupiter, but found that one of
the wires of the micrometer was broken
out and the other loose. Before ANYTHING
could be done the object rapidly disap.
peared in the glare of Jupiter. From the
fact that it was not left behind by the
planet in It's motion was convinced that
| the object was satellite.
- careful watch was kept at the pre-.
eeding limb of the planet for the reap.
pearance OF the satellite. but up to day.
light it could not be seen.
Though positive that new satellite
had been found, extreme caution suggested
that 1t would be better to wait for a care.
ful verifcation before making any an.
nouncemeni.
THE following night with the 36-inch be
longing to Professor Schaeberle the satel.
lite was again detected leaving the planet
on the following side shortly before mid
night.
THAT morning l had put new wires In
the micrometer. and now began series OF
careful measures for position. AS have
SAID. the satellite was so small tina. nc
trace of Jupiter could be admitted into
the field for reference in measures 1t was
necessary. therefore. to bisect the satellite
with the planet out of the field, and then