.


:




:

































 

 

 

 





. : , , , , , , . .

, ( 7), , ( 5), - ( 21).

21 , , , . .

, - . "" , , , : , , . .

, , . ?

, , -, ; -, ; -, , .

: 1) ; 2) ; 3) .

( ), . . , . . (, ) . , , , 21. , - , (, , , ..).

. , , . ( , " ".) : , , , . , , , - ; , -. , - and I , .

, . 3, , , . , , , . . . . : -She loved and trusted her friend. : , , ( ? ?), ( ? ?). : . .

. , , . , 20 Smithsonian Astrophysical Observatory. , , (. 3 ). the Underground Railroad 18. , . , , the Underground Railroad - , , - .

, .. . , to take part , to hold a meeting , a meeting was held , a good deal , how do you do . - . : , <>. .. .

. - , . . , F.R.S. .., . : Fellow of the Royal Society : , , , the Royal Society.

, "": , . , Sean Leicester, " " ; , , . .

, ( 8-10 ), . , , . : ? ? , , , , . (, , .) , , , , , ..

, , , , .

. , - .. . , . ( A.B. ).

, - . , (, , , , , , ).

Reading , . , . , , , - .

, , , , .

IS THERE A TENTH PLANET?

Is there an undiscovered tenth planet circling the Sun, as big as Earth? Many St. Petersburg astronomers believe so. Their opinion is based on a complicated mathematical analysis of the flight trajectory of a comet know in the astronomical catalogues under the index number of 1862-3.

The comet's orbit seems to be distorted by a large unknown gravitational center.

If, as they think, it is a planet, it would have a diameter of 5,000 to 7,500 miles and a similar mass and volume as Earth. It would be very much farther out, however-circling the Sun at a distance of about 5,000 million miles, some 54 times the distance of Earth from the Sun.

If the orbit coincides with the one calculated, it will be certain proof of the existence of the unknown planet.

MYSTERY OF LAKE SOLVED

One of the mysteries of Lake Balkhash, in eastern Kazakhstan, has been cleared up. This salt lake, as large as half a dozen English counties, always stays at the same level, though it stands in a desert which rarely gets any rain and is fed by only a few surface rivers.

It has now been discovered that there are, however, huge rivers underground.

The largest of them carries some 176,000 million gallons a year.





:


: 2016-12-18; !; : 446 |


:

:

, .
==> ...

783 - | 751 -


© 2015-2024 lektsii.org - -

: 0.012 .