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Astronomers building small space telescope to explore nearby stars

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.

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The name of the stars which astronomers will study are called M-Dwarfs. Pixabay
The name of the stars which astronomers will study are called M-Dwarfs. Pixabay
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  • Astronomers are building a space telescope to study the nearby stars.
  • the telescope will be small along with a camera attached to it.
  • Studying these nearby stars will help astronomers help study the way planets orbit around the stars.

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.

The telescope with a diameter of 9 centimetres, or 3.6 inches, will be fitted on a spacecraft known as the Star-Planet Activity Research CubeSat, or SPARCS to be launched in 2021, to focus on stars that are small, dim and cool by comparison to the sun.

Astronomers through this feat will be able study the path of planets.
Astronomers through this feat will be able study the path of planets.

These stars — known as M dwarfs — are less than half the sun’s size and temperature and they shine with barely one per cent of its brightness.

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.

Telescope can view stars at ultraviolet wavelengths unhindered. Wikimedia Commons
Telescope can view stars at ultraviolet wavelengths unhindered. Wikimedia Commons

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.

M dwarfs are exceedingly common that they make up three-quarters of all the stars in our Milky Way galaxy as well as nearly 40 billion rocky planets in habitable zones around these stars, meaning that most of the habitable-zone planets in our galaxy orbit M dwarfs.

Capturing lengthy observations of M dwarfs will let astronomers study how stellar activity affects planets that orbit the star. IANS

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Astronomers Capture 15,000 Galaxies Using Hubble Telescope

Hubble can provide some of the most sensitive space-based ultraviolet observations possible.

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Hubble Telescope
Hubble Telescope. Flickr

On one of the largest panoramic views of star birth, astronomers using the ultraviolet vision of NASAs Hubble telescope have assembled an image that features approximately 15,000 galaxies, about 12,000 of which are forming stars.

This image is a portion of the GOODS-North field, which is located in the northern constellation Ursa Major, NASA said in a statement Thursday.

The image straddles the gap between the very distant galaxies, which can only be viewed in infrared light, and closer galaxies, which can be seen across a broad spectrum.

Galaxy, hubble telescope
Representational Image of Galaxy. Wikimedia Commons.

The light from distant star-forming regions in remote galaxies started out as ultraviolet, but the expansion of the universe shifted the light into infrared wavelengths.

Also Read: NASA’s Parker Solar Probe Launches Successfully

By comparing images of star formation in the distant and nearby universe, astronomers glean a better understanding of how nearby galaxies grew from small clumps of hot, young stars long ago, NASA said.

Because Earth’s atmosphere filters most ultraviolet light, Hubble can provide some of the most sensitive space-based ultraviolet observations possible. (IANS)