What's going to come plumetting down towards Earth at nearly 30,000mph while containing real "stardust"? The answer is the NASA "Stardust" space probe.
The Stardust spacecraft was launched in 1999, with a low budget: $168.4 million (well for a space exploration program at least), and it's target was to analyse the Wild 2 comet, which had originated from beyond the reaches of Pluto.
After a five year voyage to catch up to the Wild 2 comet, Stardust opened 2 "tennis-racket-shaped particle collectors with about 100 small aerogel-filled compartments". These compartments were able to literally catch the so called "Stardust" that was expelled from the comet's tail.
Comets like Wild 2 come from the outer reaches of the solar system and have been circulating since (or before) the creation of our 9 "home" planets. So collecting physical data will let us gain an insight into the creation of the solar system, but more than that maybe into the creation of the universe as we see it today.
It's known that the capturing dust will be of a very small amount:
"thousands of particles of comet dust, virtually all of them considerably less than the width of a human hair."
However, such particles of dust will have to be studied and analysed carefully, which adament cosmologists expect to take around a decade.
Finally the "Stardust" comet probe, will arrive on the Jan. 15 in the Utah desert, after travelling at 29,000mph - this will be the fastest human made object in the history of mankind.
We can only wait for the results.
Edit: But in the end is the long wait, and the costly project really worth it?