Tag: Telescope

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The Universe by Scott Edgar

Hubble found your truth:
Expanding faster, faster
Redshift was the key.

by Scott Edgar

Edwin Hubble used redshift (‘a shift in the light a galaxy emits toward the red end of the visible light spectrum’) to measure the velocity of galaxies and it was thereby determined that the universe is expanding at an ever increasing rate.

Further reading:

‘Hubble’s Law’, Wikipedia article: https://en.wikipedia.org/wiki/Hubbles_law

Author bio:

I am a lawyer by trade and poet by passion with a conceptual interest in physics and astronomy. I try to get lost in the deserts of the southwestern United States as often as I can. You can follow Scott on Instagram @poetdelayed.

Read more of Scott’s sciku: ‘Love: Expressed in the General Theory of Relativity’.

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The deepest shade by Mike Fainzilber

the deepest shade of cold
an ambush
for the light

by Mike Fainzilber

The James Webb Space Telescope takes images of the furthest (hence oldest) and faintest objects in the universe using infrared light. In order to do this without being blinded by infrared radiation from heat emitters (including its’ own components) it has detectors that must be hyper-cooled to temperatures of less than 7 degrees Kelvins (which is approximately -266 C or -447 F).

Further reading:

‘James Webb Space Telescope’, nasa.gov, available: https://science.nasa.gov/mission/webb

Author bio:

Mike Fainzilber’s day job is a biologist. He began writing haiku and senryu during the pandemic, and this side effect of COVID-19 has not worn off yet. Editors in his two spheres of activity have been known to suggest that he should best restrict his efforts to the other sphere. Find out more about Mike’s research via his lab’s website and connect with him on X/Twitter @MFainzilber.

Read more sciku by Mike: ‘Jellyfish’ and ‘In the Deep’.

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The Dimming Forebear

Gaia. Rooting out
planetary impostures.
K’s false positives.

The Kepler Space Telescope was designed to discover earth-sized planets orbiting around other stars within our region of the Milky Way. Named after German astronomer and mathematician, Johannes Kepler, it was launched in 2009 and retired on the 15th November 2018, the 388th anniversary of the death of its namesake in 1630.

During its lifetime the Kepler Space Telescope discovered 2,662 planets, something it achieved by observing 530,506 stars and looking for drops in their intensity that could indicate a planet passing in front of them. Among these planets were some that were the correct distance from their star and had the right size and atmospheric pressure to support liquid water at the planet’s surface. Other planets discovered orbited two stars instead of one, and ‘hot Jupiters’ – gas giants similar to Jupiter but orbiting in close proximity to their star.

Yet telescopes continue to advance technologically. The Kepler Space Telescope used a photometer to observe the stars in its field of view. The Gaia Space Observatory, launched in 2013, uses a photometer along with an astrometry instrument and a radial-vector spectrometer.

Now research by Niraula et al. (2022) suggests that three or even four of the planets identified by the Kepler Space Telescope aren’t planets at all but are in fact stars. The team was reviewing the planetary data produced by the Kepler Space Telescope and realised that with updated measurements from the Gaia Space Observatory the ‘planets’ Kepler-854b, Kepler-840b, and Kepler-699b were far too large to be planets – each of them two to four times the size of Jupiter. The fourth ‘planet’, Kepler-747b, is 1.8 times the size of Jupiter, at the very top end of observed planets, but its far distance from its star suggests that its more likely to be a star itself than a planet.

Four out of over two and a half thousand discovered planets isn’t a large amount and certainly doesn’t take anything away from the incredible job that the Kepler Space Telescope did during its lifetime. Yet the new findings are hugely important for our knowledge and understanding of planets – by correcting this error the planet dataset is more accurate for those who are studying the population of planets as a whole.

Original research: http://dx.doi.org/10.3847/1538-3881/ac4f64

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2M0437b

An ancient baby
in a stellar nursery.
Hot off the star press.

One of the youngest planets ever discovered has been recorded by a team of researchers working with the Subaru and Keck-2 telescopes on the dormant volcano Mauna Kea on the island of Hawai’i. The planet, 2M0437b, was first spotted in 2018 and has taken 3 years of observations to confirm.

Planet 2M0437b. The image was taken with the Subaru Telescope on Maunakea. Credit: Subaru Telescope and Gaidos, et al. (2021)

2M0437b is found, along with its parent star (2M0437), in a stellar ‘nursery’ called the Taurus Cloud and was formed several million years ago, around the same time as when the island it was observed from emerged above the ocean. In fact, the planet is so young it’s still hot from its formation, approximately the temperature of lava: 1400-1500K. The planet is a few times larger than Jupiter and has an orbit around its star that’s around 100 times as far as the distance between Earth and the Sun.

Subaru Telescope and Keck Observatory on Maunakea. Credit: University of Hawaii Institute for Astronomy

The young planet can help further build our understanding of how planets form, and challenges some current explanations. As Gaidos et al. (2021) say “the discovery of a super-Jupiter around a very young, very low mass star challenges models of planet formation by either core accretion (which requires time) or disc instability (which requires mass).” Future observations with space telescopes such as the Hubble will help to provide more information about the infant planet and further build our knowledge of the universe.

Original research: https://arxiv.org/abs/2110.08655

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Universal truth by John Norwood

Photograph stitches
Global perspective binding
Universal truth

By John Norwood

This sciku was inspired by the first images of a black hole captured by astronomers using the Event Horizon Telescope. The black hole is found at the centre of the galaxy Messier 87, 55 million light years from earth and the image required collaboration between over 200 astronomers.

The poem is a reflection on how an image created by collating observations from various locations all over the earth gives us insight on the physical nature of the universe. 

Image of black hole Messier 87 captured by the Event Horizon Telescope. Credit: EHT Collaboration.

You can read more about the image and find references to the 6 papers here: https://eventhorizontelescope.org/

John Norwood is a Mechanical Engineer working with Carbon, Inc. to revolutionize how things are made. His interests include old houses, yoga, baking, cryptography, and bluegrass music. You can follow him on Twitter under the handle @pryoga

Enjoyed this sciku? Check out some of John’s other work: The answer is none, God may be defined, With enough data, Rivers cut corners, and Squeamish ossifrage.