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SPACE TECHNOLOGY The Office of the Chief Technologist (OCT) coordinates the Agency’s overall technology portfolio to identify development needs and reduce duplication.In managing Space Technology investments, NASA employs a portfolio approach that spans a range ofdiscipline areas and technology readiness levels (TRL) from concept study to flight demonstration. By fundinga mixture of early stage conceptual studies (TRL 1-3), ground-based and laboratory testing aimed at demonstrating technical feasibility (TRL 3-5), and relevant environment flight demonstrations (TRL 5-7), Space Technology helps NASA attain a balance between mission-driven technology investments and the long-range, transformational technology and capability investments that are required to meetour Nation’s far-reaching goals. By coordinating technology programs within NASA, OCT facilitates integration of available and new technology into operational systems that support specific human-exploration missions, science mis...

Photometry: What and Why Many people are interested in astronomy because it is visually exciting. The many marvelous pictures of celestial objects taken using large telescopes on the ground or in space are certainly the most visible manifestation of modern research astronomy. However, to do real science, one needs far more than pictures. Pictures are needed as a first step in classifying objects based on their appearance (morphology). To proceed past this initial stage of investigation, we need quantitative information- i.e. measurements of the properties of the objects. Observational astronomy becomes science only when we can start to answer questions quantitatively: How far away is that object? How much energy does it emit? How hot is it? The most fundamental information we can measure about celestial objects past our solar system is the amount of energy, in the form of electromagnetic radiation, that we receive from that object. This quantity we will call the flux. The science of m...

If you go to the country, far from city lights, you can see about 3,000 stars on a clear night. If your eyes were bigger, you could see many more stars. With a pair of binoculars, an optical device that effectively enlarges the pupil of your eye by about 30 times, the number of stars you can see increases to the tens of thousands. With a medium-sized telescope with a light-collecting mirror 30 centimeters in diameter, you can see hundreds of thousands of stars. With a large observatory telescope, millions of stars become visible. Download Here