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Dark Energy

The Nobel Prize for Physics has just been offered to the three scientists, Saul Perlmutter, Brian Schmidt and Adam Riess, who found evidence in 1998 that the expansion of the universe was accelerating. It was Edwin Hubble who first showed that the universe was...

Stars in Egypt

Those of us who have come from Britain will never have seen the summer stars as we see them here in Egypt. Back home, in the high latitudes, twilight lingers on till after 11.00 pm, a beautiful time for long conversations in the grass but useless for viewing the Milky...

Globular clusters

In 1974, a radio message, written by Carl Sagan, was sent to the Globular cluster, M13, in the constellation of Hercules. Since the cluster is 25,000 light years away, a reply by return of post cannot be expected for another 50,000 years. If it wasn’t a joke, it was a...

Surveillance of the Sun

Just as the Sun and Earth were created together in the same vortex, so will they vanish together in the same apocalypse. The destinies of the Sun and Earth are bound together. And that’s why it’s time to get to know our partner better. And that’s why NASA has sent up...

MESSENGER to Mercury

Mercury whips round the sun in only 88 Earth days but spins on its own axis at such a leisurely pace that it takes 176 Earth days to complete one Mercury day. As the sun rises over the bleak and blistered surface, it appears 3 times larger than on Earth and 11 times...