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the hubble space telescope for its 31st

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birthday has captured a glimpse of an

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incredible star one of the brightest

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stars in our galaxy

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this giant luminous blue variable star

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known as a.g karenai is huge 70 times

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more massive than our sun and shining

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with the brilliance of a million suns

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the star is surrounded by a glowing halo

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of gas and dust

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this vast structure was created from

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giant eruptions from the star about ten

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thousand years ago

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creating an expanding shell that is now

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nearly five light years across

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similar to the distance from our sun to

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its nearest neighbor star

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the outburst expelled the star's outer

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layers blowing out material nearly ten

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times the mass of our sun

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the nebula around the star from these

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ancient eruptions is being impacted by a

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powerful wind of charged particles

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flowing out from the star at a million

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kilometers per hour ten times faster

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than the nebula itself is expanding

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as this outflowing gas slams into the

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slower moving outer nebula it creates a

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snowplow effect clearing a cavity around

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the star and sculpting structures in the

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nebula

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searing radiation from the star is

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lighting up the nebula as seen by hubble

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in both visible light and in the

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ultraviolet light that can only be seen

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from space

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red colors indicate glowing hydrogen gas

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laced with nitrogen gas

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at the upper left in the image the

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diffuse red glow shows a region where

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the stellar wind has broken through a

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tenuous region of material and swept it

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into space

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blue features shaped like tadpoles and

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bubbles

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are dust clumps shaped by the stellar

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wind and illuminated by the star's

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reflected light

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this incredible image from the hubble

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space telescope shows how even one star

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can be incredibly beautiful and powerful

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as it impacts its surrounding

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environment

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since hubble orbits above the earth's

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atmosphere it can give us a clear

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detailed view of this kind of

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awe-inspiring beauty and activity in the

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universe

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for the past 31 years the hubble space

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telescope has changed the way we think

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of space and our place in the cosmos

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hubble has revealed an incredible

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diversity of stars and gives us pristine

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views into beautiful interstellar

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nebulas where new stars and their

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surrounding discs of dust and planets

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continue to form

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looking even deeper into space

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hubble makes it possible for us to see

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across billions of light years revealing

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ancient adolescent galaxies that we can

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compare with our own milky way

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hubble is even refining our

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understanding of the age of the universe

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and its rate of expansion

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it sees the telltale effects of

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mysterious black holes dark matter and

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dark energy over time

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in the past year alone hubble revealed a

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large concentration of small black holes

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nestled within the heart of a globular

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cluster of stars

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it rewound the clock to calculate the

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age and sight of a supernova blast

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it also detected a possible new second

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atmosphere formed on a distant exoplanet

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and closer to home

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hubble spotted a comet lurking near

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jupiter and its trojan asteroids

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these are just a handful of hubble's

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recent discoveries

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hubble remains in excellent technical

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health and is expected to continue its

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exploration of the universe for years to

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come

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from 1993 to 2009 there were five

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astronaut servicing missions for repairs

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and upgrades of the telescope

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these along with an ongoing crew of

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attentive experts on the ground are

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keeping the telescope today at the peak

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of its scientific capabilities

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you can find out more about the hubble

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space telescope at the website nasa.gov