The Solar TErrestrial RElations Observatory (STEREO) mission consists of two nearly identical solar observatories. One orbits ahead of Earth; the other trails behind. When positioned 180-degrees apart in their orbits, the spacecraft can observe the entire sun simultaneously. STEREO traces the flow of energy and matter from the sun to Earth. It also probes the 3D structure of coronal mass ejections - violent eruptions of matter from the sun that can disrupt satellites and power grids - and help us understand why they happen. NASA's Goddard Space Flight Center provided particle detectors and a telescope for STEREO's IMPACT suite of instruments. The mission launched in 2006.
The Space Telescope Imaging Spectrograph (STIS) is an instrument on the Hubble Space Telescope. It combines a camera with a spectrograph, and covers a wide range of wavelengths from the near-infrared region into the ultraviolet. The spectrograph spreads out light gathered by the Hubble Space Telescope so that it can be analyzed to determine things like the chemical composition, motions, and temperatures of astronomical objects. STIS also has an instrument called a coronagraph. It can block light from bright objects in a region being observed, which make sit possible to study fainter targets nearby. STIS was installed on the Hubble Space Telescope during Servicing Mission 2 in 1997. The instrument malfunctioned in August 2004, and was repaired during Servicing Mission 4 in 2009.
Wide Field Camera 3 (WFC3) is an instrument on the Hubble Space Telescope. Astronauts installed WFC3 during the final servicing mission to the space observatory in May 2009. With a "panchromatic" grasp of light extending from the ultraviolet through the visible and into the infrared, WFC3 is an extremely powerful imaging instrument, extending Hubble's capabilities by seeing deeper into the universe.