In the first analysis of space dust sent to earth by NASA`s Stardust mission, physicists suggest that the tiny specks, which likely originated from beyond our solar system, are more complex in composition and structure than previously imagined.
As a comet heads towards a close flyby of Mars Oct 19 this year, NASA is taking steps to protect its Mars orbiters while preserving opportunities to gather valuable scientific data, the US space agency said in a statement.
Three NASA science instruments aboard the European Space Agency`s (ESA) Rosetta spacecraft, which is set to become the first to orbit a comet and land a probe on its nucleus, are beginning observations and sending science data back to Earth.
Whenever an asteroid or a comet hit the earth in the past, the impact melted tonnes of soil and rock, some of which formed glass as it cooled. Now, a thrilling discovery has found that these impact glasses stored the signatures of ancient life at the time of the impact.