THE NIGHT SKY
Sir,-If, the last paragraph of E. M. Wilson’s letter has again aroused the curiosity of your commentator in the matter of stellar distances let him spend a few moments at the library reading Chapter XI. of Spencer Jones’s Worlds Without End. This chapter deals lucidly, and with a convenient time scale, with the Spiral Nebulae whose numbers run into millions and whose distances extend to the limits of photographically explored space. Spencer Jones mentions a Nebula at 230 million light years, but the 120-inch telescope being built for the Lick Observatory is expected to reach 900 million light years. A light year is the distance covered in a year by light travelling at 186,000
mules per second.
A.J.
H.
(Moa Flat)
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New Zealand Listener, Volume 16, Issue 416, 13 June 1947, Page 5
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124THE NIGHT SKY New Zealand Listener, Volume 16, Issue 416, 13 June 1947, Page 5
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