Washington: Astronomers are in the process of building a small space telescope to explore the flares and sunspots of small nearby stars to assess how habitable the space environment is for planets orbiting them.
Astronomers working on space telescope
The telescope will be built alongside a camera with two ultraviolet (UV)-sensitive detectors to be optimised for observations using UV light, which strongly affects the planet's atmosphere and its potential to harbour life on the surface.
"People have been monitoring M dwarfs as best they can in visible light. But the stars' strongest flares occur mainly in the ultraviolet, which Earth's atmosphere mostly blocks," said Evgenya Shkolnik, Assistant Professor at the Arizona State University.
Although the orbiting Hubble Space Telescope can view stars at ultraviolet wavelengths unhindered, its overcrowded observing schedule would let it dedicate only the briefest of efforts to M dwarfs. The telescope uses a mirror system with coatings optimized for ultraviolet light. Together with the camera, the system can measure very small changes in the brightness of M dwarf stars to carry out the primary science of the mission.