So"lar, a. [L. solaris, fr.
sol the sun; akin to As. sōl, Icel.
sōl, Goth. sauil, Lith. saule, W.
haul,. sul, Skr. svar, perhaps to E.
sun:F. solaire. Cf. Parasol. Sun.]
1. Of or pertaining to the sun; proceeding from
the sun; as, the solar system; solar light; solar
rays; solar influence. See Solar system,
2. (Astrol.) Born under the predominant
influence of the sun. [Obs.]
And proud beside, as solar people
3. Measured by the progress or revolution of
the sun in the ecliptic; as, the solar year.
4. Produced by the action of the sun, or
peculiarly affected by its influence.
They denominate some herbs solar, and some
Solar cycle. See under Cycle. --
Solar day. See Day, 2. --
Solar engine, an engine in which the energy of
solar heat is used to produce motion, as in evaporating water for a
steam engine, or expanding air for an air engine. --
Solar flowers (Bot.), flowers which open
and shut daily at certain hours. -- Solar lamp,
an argand lamp. -- Solar microscope, a
microscope consisting essentially, first, of a mirror for reflecting a
beam of sunlight through the tube, which sometimes is fixed in a
window shutter; secondly, of a condenser, or large lens, for
converging the beam upon the object; and, thirdly, of a small lens, or
magnifier, for throwing an enlarged image of the object at its focus
upon a screen in a dark room or in a darkened box.
-- Solar month. See under Month.
-- Solar oil, a paraffin oil used an illuminant
and lubricant. -- Solar phosphori
(Physics), certain substances, as the diamond, siulphide of
barium (Bolognese or Bologna phosphorus), calcium sulphide, etc.,
which become phosphorescent, and shine in the dark, after exposure to
sunlight or other intense light. -- Solar
plexus (Anat.), a nervous plexus situated in the
dorsal and anterior part of the abdomen, consisting of several
sympathetic ganglia with connecting and radiating nerve fibers; -- so
called in allusion to the radiating nerve fibers. --
Solar spots. See Sun spots, under
Sun. -- Solar system (Astron.),
the sun, with the group of celestial bodies which, held by its
attraction, revolve round it. The system comprises the major planets,
with their satellites; the minor planets, or asteroids, and the
comets; also, the meteorids, the matter that furnishes the zodiacal
light, and the rings of Saturn. The satellites that revolve about the
major planets are twenty-two in number, of which the Earth has one
(see Moon.), Mars two, Jupiter five, Saturn nine, Uranus four,
and Neptune one. The asteroids, between Mars and Jupiter, thus far
discovered (1900), number about five hundred, the first four of which
were found near the beginning of the century, and are called Ceres,
Pallas, Juno, and Vesta.
The principal elements of the major planets, and of the comets
seen at more than one perihelion passage, are exhibited in the
following tables: --
I. -- Major Planets.
Symbol.Name.Mean distance -- that of the Earth being unity.Period in
days.Eccentricity.Inclination of orbit.Diameter in miles
II. -- Periodic Comets.
Name.Greatest distance from sun.Least distance from sun.Inclination of
- 12 54
-- Solar telegraph, telegraph for signaling
by flashes of reflected sunlight. -- Solar
time. See Apparent time, under