Jun 28, 2024
seen from Germany
seen from Argentina
seen from France
seen from China
seen from United States
seen from China
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seen from Türkiye
seen from Australia
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val do mar
quimérica voz da miña vida sobre a túa fronteira sen límites a herba dunha onda que sente
esta morte a túa maldade o corpo do beixo que sente os coitelos no seran coma ti vívida dozura da tristeza espida diante da lúa
azul dese ceo tan de bosque tan inventado pola razón final que é capaz de existir
© Manoel T, 2023
writing tip #3373:
yes, writing does make you a writer. but did you know that it also makes you annoying?
Hubble\u2019s modern art
A piece of art? A time-lapse photo? A flickering light show?
At first glance, this image looks nothing like the images that we are used to seeing from Hubble.
The distinctive splashes of colour must surely be a piece of modern art, or an example of the photographic technique of "light painting". Or, could they be the trademark tracks of electrically charged particles in a bubble chamber? On a space theme, how about a time-lapse of the paths of orbiting satellites?
The answer? None of the above. In fact, this is a genuine frame that Hubble relayed back from an observing session.
Hubble uses a Fine Guidance System (FGS) in order to maintain stability whilst performing observations. A set of gyroscopes measures the attitude of the telescope, which is then corrected by a set of reaction wheels. In order to compensate for gyroscopic drift, the FGS locks onto a fixed point in space, which is referred to as a guide star.
It is suspected that in this case, Hubble had locked onto a bad guide star, potentially a double star or binary. This caused an error in the tracking system, resulting in this remarkable picture of brightly coloured stellar streaks. The prominent red streaks are from stars in the globular cluster NGC 288. It seems that even when Hubble makes a mistake, it can still kick-start our imagination.
A version of this image was entered into the Hubble's Hidden Treasures image processing competition by contestant Judy Schmidt.
https://www.spacetelescope.org/images/potw