Jamie4590 wrote:
Is it because of a change in technology that shuttles are now used or does NASA still have projects that use the re-entry capsule?
The idea was that the shuttles would be reusable (to save money), and allow a more controlled landing. Being able to fly to the desired landing site and land in a more-or-less horizontal direction is a lot more gentle on what's inside than dropping straight down on a parachute.
Besides delivering cargos into space, the shuttle is supposed to be able to return items intact from space for reuse (like the cameras from the Hubble, and the astronauts). Hardware for space flight is built as light-weight as possible, because it is so expensive to lift it into orbit. The acceleration and vibration of launch is tough, but landing can be even tougher-- hence the desire to land on a runway instead of dropping straight down on a parachute.
I have heard that there was some consideration of returning the entire Hubble Space Telescope to Earth in the shuttle, but that it would not survive the landing.
The Russian Space Agency still uses capsules for re-entry, and NASA still makes use of Russian flights for both supplies and crew, so yes, you could say that NASA still uses capsules for re-entry.
NASA (and others) also use capsule-style entry vehicles for unmanned probes, like the Mars Rovers, Stardust (when it returned to Earth), and the Huygens probe (entering the atmosphere of Titan), to name a few.
Ed