HD1 information

HD1
HD1
	Three-color image of HD1, the most distant galaxy candidate to date, created using data from the VISTA telescope in Paranal Observatory. The red object in the center of the zoom-in image is HD1.
Observation data (J2000 epoch)
Constellation	Sextans
Right ascension	10h 01m 51.31s
Declination	02° 32′ 50.0″
Redshift	13.27
Distance	≈33.288 billion ly (10.206 billion pc) ; (present proper distance); ≈13.4418 billion ly (4.1213 billion pc) ; (light-travel distance);

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Dark Ages

Reionization

Matter-dominated
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Water on Earth

Single-celled life

Photosynthesis

Multicellular
life

Vertebrates

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Earliest Universe

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Earliest stars

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Earliest galaxy

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Earliest quasar / black hole

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Omega Centauri

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Andromeda Galaxy

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Milky Way spirals

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NGC 188 star cluster

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Alpha Centauri

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Earth / Solar System

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Earliest known life

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Earliest oxygen

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Atmospheric oxygen

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Sexual reproduction

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Cambrian explosion

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Earliest apes / humans

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(billion years ago)

HD1 is a proposed high-redshift galaxy, which is considered (as of April 2022) to be one of the earliest and most distant known galaxies yet identified in the observable universe. The galaxy, with an estimated redshift of approximately z = 13.27, is seen as it was about 324 million years after the Big Bang, which was 13.787 billion years ago.^[6] It has a light-travel distance (lookback time) of 13.463 billion light-years from Earth, and, due to the expansion of the universe, a present proper distance of 33.288 billion light-years.^[5]

^ Cite error: The named reference ALMA-20220407 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference ARX-20220212 was invoked but never defined (see the help page).
^ Cite error: The named reference DJM-2008 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference NS-20220407 was invoked but never defined (see the help page).
^ ^a ^b Kempner, Joshua (2022). "KEMPNER Cosmology Calculator". Kempner.net. Retrieved 6 August 2022. KEMP Cosmology Calculator - Set H₀=67.4 and Omega_M=0.315 (see Table/Planck2018 at "Lambda-CDM model#Parameters")
^ Planck Collaboration (2020). "Planck 2018 results. VI. Cosmological parameters". Astronomy & Astrophysics. 641. page A6 (see PDF page 15, Table 2: "Age/Gyr", last column). arXiv:1807.06209. Bibcode:2020A&A...641A...6P. doi:10.1051/0004-6361/201833910. S2CID 119335614.

[ALMA-20220407-1] Cite error: The named reference ALMA-20220407 was invoked but never defined (see the help page).

[ARX-20220212-2] Cite error: The named reference ARX-20220212 was invoked but never defined (see the help page).

[DJM-2008-3] Cite error: The named reference DJM-2008 was invoked but never defined (see the help page).

[NS-20220407-4] Cite error: The named reference NS-20220407 was invoked but never defined (see the help page).

[KEMP-2022-5] Kempner, Joshua (2022). "KEMPNER Cosmology Calculator". Kempner.net. Retrieved 6 August 2022. KEMP Cosmology Calculator - Set H₀=67.4 and Omega_M=0.315 (see Table/Planck2018 at "Lambda-CDM model#Parameters")

[Planck_2018age-6] Planck Collaboration (2020). "Planck 2018 results. VI. Cosmological parameters". Astronomy & Astrophysics. 641. page A6 (see PDF page 15, Table 2: "Age/Gyr", last column). arXiv:1807.06209. Bibcode:2020A&A...641A...6P. doi:10.1051/0004-6361/201833910. S2CID 119335614.

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