As the years went by, and the well-known scientists Isaak Newton and Johannes Kepler were born, the development of the telescope took speed. ... The primary mirror, which is concave, collects incoming light. Once the primary mirror has collected incoming light, it reflects the light toward the secondary mirror that is convex and smaller. ... With this first service mission COSTAR replaced the High Speed Photometer onboard HST. ... Infrared light from forming stars and planets penetrates dust more easily than light at optical wavelengths. ...

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