| Robotic spacecraft is cheaper yet people are sent into space, why? |
| Due to analytical decision-making or constant adjustments like monitoring microgravity experiments in protein crystal growth or looking for evidence of fossil life on mars; humans are preferred. |
| When are we going to mars? |
| Probably by the end of year 2010. |
| What is the maximum speed of a space shuttle? |
| It is about 7.8 km/s. for earth's closer orbital missions. |
| What is its normal altitude? |
| It is about 300 km to 500 km. Above sea level, depending on its mission. |
| How much fuel does it use? |
| It is normally loaded with more than 500.00 gallons of super cooled liquid oxygen and liquid hydrogen. |
| What are the names of the U.S. Space shuttle orbiters? |
| These are enterprise, Columbia, challenger, Discovery, Atlantis and Endeavor. |
| On which date, challenger's accident took place? |
| Challenger along with its seven member crew accidented on January 28, 1986. |
| What is the approximate cost of a Space Shuttle? |
| It is about 1.7 billion dollars. |
| What happen to used spacecraft? |
| They undergo detailed post- mission analysis and after that they are displayed for the public at NASA centers and science museums, across the country. |
| Is it true that launching the space shuttle creates a local ozone hole, and that the shuttle releases more chlorine than all industrial uses worldwide? |
| As per 1990 report it was found that about 0.25 percent of the total amount of halocarbons released annually worldwide, was released during space shuttle missions, which can't harm ozone layer. |
