NASA's Rovers Continue Martian Missions 05.24.05 -- NASA's Mars rover Opportunity is trying to escape from a sand trap, while its twin, Spirit, has been busy finding new clues to a wet and violent early Martian history.

Kalpana Chawla
(July 1, 1961 - February 1, 2003) was an astronaut and space shuttle mission specialist of STS-107 (Columbia) who was killed when the craft disintegrated after reentry into the Earth's atmosphere. Kalpana Chawla Table of contents showTocToggle("show","hide") 1 Early Life 2 Education 3 NASA Career 4 Personal Characteristics 5 Memoria 6 See also 7 External Links Early Life Chawla was born in Karnal, Haryana, India. Her interest in flight was inspired by J. R. D. Tata, India's first pilot. Education Chawla studied aeronautical engineering at the Punjab Engineering College in Punjab, India in 1982 where she earned her Bachelor of Science degree. Thereafter she moved to the United States to obtain a Master of Science degree in aerospace engineering from University of Texas (1984). Dr. Chawla earned a doctorate in aerospace

The final defining moment was when NASA, in desperation to see their only remaining project saved, went to the Air Force for its blessing. NASA asked that the AF place all of their future launches on the shuttle instead of their current expendable launchers (like the Titan II), in return for which they would no longer have to continue spending money upgrading those designs -- the shuttle would provide more than enough capability.

With the budgets being pressed by inflation at home and the Vietnam war abroad, Congress and the Administration generally couldn't care less about anything as long-term as space exploration and were therefore looking to make further deep cuts to NASAs budget. But with a single long term project on the books, there wasn't much they could do in terms of cutting whole projects -- the shuttle was all that was left, cut that and there would be no US manned space program by 1980. America's first space station, the 75 ton Skylab was launched May 14, 1973 by a two-stage version of the Saturn V booster (the SL-1 mission). Severe damage was sustained during launch, including the loss of the station's micrometeoroid shield/sun shade and one of its main solar panels. Debris from the lost micrometeroid shield further complicated matters by pinning the remaining solar panel to the side of the station, preventing its deployment and thus leaving the station with a huge power deficit. The station underwent a extensive repair by the first crew launched on May 25, 1973 (the SL-2 mission) atop a Saturn 1B. Two additional missions followed on July 28, 1973 (SL-3) and November 16, 1973 (SL-4) with stay times of 28, 59, and 84 days, respectively. The last Skylab crew returned to Earth on February 8, 1974.

Skylab was actually the refitted S-IVB third stage of a Saturn V booster, a leftover from the Apollo program originally intended for one of the canceled moon landing missions (Apollos 18-20). A product of the Apollo Applications program (a program tasked with finding long-term uses for Apollo program hardware), Skylab was originally planned as a minimially-altered S-IVB to be launched on a Saturn IB rocket. The small size of the IB would have required Skylab to double as a rocket stage during launch, only being retrofitted as a space station once on-orbit. With the cancellation of Apollo missions 18-20 a Saturn V was made available and thus the "Wet Workshop" concept, as it was called, was put aside and Skylab was launched dry and fully outfitted. Skylab's grid flooring system is a highly visable legacy of the wet workshop concept.

Following the last mission the Station was positioned in a parking orbit expected to last at least 8 years. Increased solar activity heating the outer layers of the earth's atmosphere and thereby increasing drag on the Station led to an early reentry on July 11, 1979. Skylab disintegrated over Western Australia and the Indian Ocean, casting large pieces of debris in populated areas (without injury). The reentry prevented any further use by the then unfinished Space Shuttle as was envisioned by some at NASA.

Two flight-quality Skylabs were built, the second, a backup, is on display at the National Air and Space Museum in Washington, DC.

Shuttle description

The Space Shuttle consists of four main components; the reuseable orbiter itself, a large expendable external fuel tank, and a pair of reusable solid-fuel booster rockets. The fuel tank and booster rockets are jettisoned during ascent. The longest the shuttle has stayed in orbit in a single mission is 17.5 days, on mission STS-80 in November 1996.

The Shuttle has a large payload bay taking up much of its length. The payload bay doors have heat radiators mounted on their inner surfaces, and so are kept open while the Shuttle is in orbit for thermal control. Thermal control is also maintained by adjusting the orientation of the Shuttle relative to Earth and Sun. Inside the payload bay is the Remote Manipulator System, also known as the Canadarm, a robot arm used to retrieve and deploy payloads. Until the loss of Columbia, the Canadarm has only been included on missions where it will be used. Since the arm is a crucial part of the Thermal Protection Inspection procedures now required for shuttle flights, it will likely be included on all future flights.

NASA had conducted a series of paper-projects throughout the 1960s on the topic of reusable spacecraft to replace their expedient "one-off" systems like Mercury, Gemini, and Apollo.

With a baseline project now gelling, NASA started to work though the process of obtaining stable funding for the five years the project would take to develop. Here too they found themselves increasingly backed into a corner.

John F. Kennedy Space Center
John F. Kennedy Space Center The John F. Kennedy Space Center (KSC) is the NASA space vehicle launch facility (spaceport) at Cape Canaveral on Merritt Island in Florida, United States. The site is midway between Miami and Jacksonville, Florida. It is 55 km long and around 10 km wide, covering 56,700 hectares. Around 17,000 people work at the site. There is a visitor center and public tours and KSC is a major tourist destination for visitors to Florida. Because much of KSC is off limits to development, the site also serves as an important wildlife sanctuary. Operations are currently controlled from Launch Complex 39, the location of the Vehicle Assembly Building. 6 km to the east of the assembly building are the two launch pads. 8 km south

But there was no way that a space station or Air Force payloads could demand such rates (roughly 1 to 2 per week), so they went further and suggested that all future US launches would take place on the shuttle, once built. In order to do this the cost of launching the shuttle would have to be lower than any other system with the exception of the very small, which they ignored for practical reasons, and very large, which were rare and terribly expensive anyway.