Someone onco put forward an attractive though unlikely theory. Throughout the earth's revolution around the Sun, there is one point of space always
hidden from our eyes. This point is the opposite part of the Earth's orbit
which is always hidden by the San. Could there be another planet there,
essentially similar to our own but always invisible ?
If a space probe today sent back evidence that such a world existed, it
would cause not much more sensation than Sir William Herscheel's
discovery of a new planet, Uranus, in 1781. Herscheel was an extraordinary
man- no other astronomer has ever covered so vast a field of work and
his career deserves study. He was born in Hanover in Germany, left German
army in 1757 and arrived in England the same year with no money.
Serious observation began in 1774. He set himself the astonishing task of
'reviewing the heavens' in other words pointing his telescope to every
accessible part of the sky and recording what he saw. The first review
was made in 1775, the second and most momentous in 1780-81. It was
that he discovered Uranus. Afterwards, supported by the royal grant in
recognition of
his work, he was able to devote himself entirely to astronomy.
His final achievements spread from the Sun and Moon to remote galaxies.
Questions:
a) What was the attractive theory about?
the heavens​