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NASA's Hubble Space Telescope has looked

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for evidence of atmospheres around

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several earth sized planets in the

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Trappist one system including three that

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are in the star's habitable zone where

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liquid water could exist on the surface

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a lot of astronomers and space

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enthusiasts were very excited by the

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discovery of the seven earth sized

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planets of the Trappist warning system

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the prends orbit an ultra-cool dwarf

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star about 40 light years away

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scientists have theories about what

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these plants may be like and whether

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they could support life but we won't

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know for sure until we get more

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comprehensive observations of this

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system including data on the planets

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atmospheres as a planet in the Travis

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one system passes between us and the

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star it blocks out a small portion of

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the star's light telescopes like Hubble

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can look at changes in specific

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wavelengths of light which provide clues

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to the composition in size of the

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planet's atmosphere Hubble observations

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in May 2016 of Travis one B and C showed

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that these planets do not seem to have

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thick puffy hydrogen-rich atmosphere

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this indicates a higher chance that they

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are rocky terrestrial planets

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rather than many gas giants Hubble then

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observed planets d e f and g in december

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2016 in january 2017 in near-infrared

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wavelengths and the results were similar

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Hubble found no sign of thick puffy

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hydrogen-rich atmosphere for any of the

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four planets the data suggests that

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there is not this gas giant like

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atmosphere for planets D E and F and the

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data from this round of observations was

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not as strong for planet G so while

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there's no evidence for a thick

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hydrogen-rich atmosphere on G the

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researchers are not yet ruling it out

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planets e F and G orbit at distances

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where temperatures would allow for

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liquid water while D is likely a little

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too hot Hubble is yet to take

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observations of Planet H which is

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outside the system's habitable zone

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to summarize Hubble has not seen

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evidence of thick hydrogen-rich

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atmosphere for planets b c d e and f and

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of those five planets E&S are in the

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habitable zone planet needs more data

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and Hubble is not yet looked at planet H

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it's worth noting though that even

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though planets outside the habitable

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zone still might be able to have liquid

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water somewhere on its surface in

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certain conditions it's also worth

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noting that if any of these planets have

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high-altitude clouds and Hayes's that

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would block couples ability to detect a

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thick hydrogen-rich atmosphere but such

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an atmosphere is not likely to exist on

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these planets many possibilities remain

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for what types of atmospheres these

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planets have or whether they even have

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atmospheres the Travis one planets could

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have compact atmosphere similar to Mars

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Venus Earth or something entirely

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different researchers hope to use

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Hubble's ultraviolet capabilities to

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look for evidence of water vapour or

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methane and NASA's upcoming James Webb

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Space Telescope will look in the far

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infrared to further characterize these

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atmospheres future telescopes also hope

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to look for hints of whether the planets

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are habitable and if life could be

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present the Travis one system provides

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the best opportunity we currently have

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to study earth-sized exoplanet over the

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next few years Hubble and other

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telescopes will work together each

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contributing important observations so

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for the first time ever we will have an

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in-depth understanding of a set of