Cheap Astronomy - Dear CA #103 - There Are Always Possibilities

The 365 Days of Astronomy

Hosted by Steve Nerlich.

What can the anti-matter be?

Dear Cheap Astronomy – How much antimatter is there and will it eventually annihilate?

Antimatter is generally found in subatomic particle form – so there’s antiprotons and anti-

electrons, which can rarely come to together to form an antihydrogen atom. But

that’s about it, an anti-helium nucleus has been created in a laboratory but neither it nor any

other more complex anti-nuclei have been observed in nature.

Dear Cheap Astronomy – How fast could we get to Alpha Centauri with current technologies?

If we calculate the trip duration based on speeds achievable with current technology, a mission

to Alpha Centauri, the nearest star system to ours, would take over 6,000 years. But even that is

wildly optimistic when you consider the mass you need to accelerate up to those speeds.

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