The Scranton tribune. [volume] (Scranton, Pa.) 1891-1910, 1896-11-06
LEBECK Z CORN
ORB OF DAY.

The following notes are compiled from
lecture delivered at the DreNel insti-
Young, Of Princeton university:
The earth derives 81 per cent. of It's en-
ergy from the sun.
Menoric showers give rise to the
greater proportion OF the remaining per
cent The stars also feebly help.
Our sun is but one OF thousands of 9TH
-in or equal or greater magnitude:
Wind power is derived from the un-
equal heating OF various portions Of the
Earth by the suns rays.
Water power is derived from the evap-
grafton OF water by the suns heat and its
deposition on highlands in the form OF
snow or rain.
Plant life is directly dependent on the
sun for light and heat.
Muscular power is derived from the con-
sumption OF food. either animal or veg
etable. the energy Of which is directly
traceable to the sun.
Steam power is the stored-up energy Of
the sun rays In past ages in the form OF
called.
The distance Of the sun from the earth
Is 90 million miles.
The earth aid moon could be placed
inside the sun II 1t was followed out,
without disturbing the present relations,
ana me moon would revolve at distance
arout hait way to the surface.
The determination of the distance of
the sun Is known to be accurate within
onc-quarter of per cent.
nc buii ulStdICe Is equal 10 about
l2ooo times the diameter of the earth
train running at 60 miles an hour
"ou.d reach the sun in 175 years.
,,At the rate or two cents mile. the
rare to the sun would be about S1,5CO, 900.
The light-year is the astronomical unit
of stellar distances.
The apparent diameter Of the sun is
anout one-half degree.
Suns, to the number of 10 could be ar.
ranged around the circle of the horizon.
II the energy of the sun Is only rad
lated from 1t in the direction of other ma
terial bodies, and not in all directions,
me shrinkage theory affords satisfac-
Tory explanation of all known phenomena.
base ball compared to a sphere q
If dget ~, IN a,ameter gives the relative size
OF Urine the EARN ana sun.
the earth. -
The mass of the sun is 100000 times that
The force of gravity at the suns sur
lace Is q times greater than the force of
gravity on the earth.
An average sized person would weigh
ton on the suns surface,
me average density of the sun is only
quarter of that Of the earth.
vaneed bs nbsSsptfa 1 theory was aS
age or the suns surface gives rise to heat
~ !he same manner as any failing body
nogs, WSisn, as: d for instance. 'vhen a heavy
The average density of the sun may be
compared to the density Of water.
we cannot see the sun itself, we see
only the cloud or vapor shell that covers
IL; IKE the mantle of Welsbach burner
we never get nearer than a hundred
miles optically of the moon, even with the
most powerful telescopes.
Ine temperature of the suns surface
mas been measured and determined TO be
heit. 80
The most accurate determinations Of the
suns temperature. made by Wilson and
Gray, IN Ireland. place 1t as 1000 degrees
Fahrenheit.
This termination is correct within loo
degrees '
At very small distances within the
suns surface the temperature rises just
as 1t does in the earth.
The high temperature Of the sun Is not
maintained by combustion: of this astron.
Diners are sure. II the temperature was
maintained in this way the sun would
nave burnt out long ago. Shrinkage in
SIZE Is the now accepted theory of the
source of the SUMS heat and light.
The rotation of the sun in q magnetic
field has been advanced as a possible
cause OF the suns heat This Is dis.
suns. rotation would have been so i'm
peded as to have completely stopped
within 500 years.
The theory of meteors collid!ng with the
sun. an old and once popular idea ad-
vancee In accounting for the suns heat
is now rejected.
If the sun contracts 800 feet in diameter
llo years TO detect it with our largest
lsscopes.
If the sun was enclosed in a mass of
81 melting It.
The sun is giving US thirty calories Of