MARS and the GRAND CANYON

Ius Chasma
Ius Chasma

“The ultimate objective of comparative planetology, it might be said, is something like a vast computer program into which we insert a few input parameters (perhaps the initial mass, composition and angular momentum of a protoplanet and the population of neighboring objects that strike it) and then derive the complete evolution of the planet.” Carl…


Comet Borrelly rocks core scientific beliefs

Comet Borrelly
Comet Borrelly

[The blockquoted text in brown is from an original news story. The highlighted text is a statement of the “core beliefs” held by astronomers. The regular text is my commentary with short quotations in brown.] The above headline accompanied the news item in the Sydney Morning Herald of 9/27. Comet Borrelly has been visited by…