Francisco Perez captures the stunning #M81 galaxy with his #Celestron #C8!

Discovered by German astronomer #JohannBode in 1774, M81 is one of the brightest galaxies in the night sky at an #apparentmagnitude of 6.9. #astrophotography

... on apparent brightness potentially inaccurate without accounting for cosmological effects.

distance #Cosmology #SpaceFacts #ApparentMagnitude #Redshift #DistanceMeasurement #ExpandingUniverse #GalaxyBrightness #CosmologicalRedshift #IntrinsicLuminosity #CosmologicalDistanceLadder

...ng distant galaxies appear fainter than they would in a static universe. Correcting for this effect is crucial for accurate distance measurements.

🔴 #Cosmology #SpaceFacts #Redshift #ApparentMagnitude #DistanceMeasurement #ExpandingUniverse #GalaxyBrightness #CosmologicalRedshift #LightStret...

New in the #VirtualObservatory: “JADES galaxies at z>8 in GOODS-N & GOODS-S” by Hainline K.N. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/964/71
#infraredastronomy #spectroscopy #ApparentMagnitude #ultravioletastronomy

New in the #VirtualObservatory: “Euclid Ecliptic Survey asteroid Prot” by Irureta-Goyena B.Y. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/710/A27
#ApparentMagnitude #asteroids #visibleastronomy

New in the #VirtualObservatory: “Gaia & 2MASS fitting for Pleiades members” by Liu R. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/169/116
#ApparentMagnitude #stellarmasses #openstarclusters #photometry

New in the #VirtualObservatory: “COSMOS-Web Brightest Group Galaxy (BGG) Cat.” by Gozaliasl G. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/703/A129
#redshifted #galaxygroups #photometry #ApparentMagnitude

New in the #VirtualObservatory: “SN rates and luminosity functions from ASAS-SN II” by Pessi T. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/703/A34
#visibleastronomy #galaxies #stellardistance #ApparentMagnitude

New in the #VirtualObservatory: “PHATTER M33 Cepheids HST phot. & distances” by Breuval L. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/951/118
#ApparentMagnitude #hstphotometry #variablestars #surveys

New in the #VirtualObservatory: “MUSE NGC 253 planetary nebulae” by Congiu E. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A125
#visibleastronomy #PlanetaryNebulae #ApparentMagnitude #galaxies

A star's apparent magnitude (how bright it seems to us) is affected not only by its luminosity but also its distance from Earth and the interstellar dust that may obscure its light. #ApparentMagnitude #Luminosity #InterstellarDust

A star's apparent brightness, how bright it appears from Earth, is different from its intrinsic luminosity, its actual energy output. Distance and interstellar dust play a huge role in this difference. #ApparentMagnitude #IntrinsicLuminosity #DistanceModulus

...omy #ApparentMagnitude #AbsoluteMagnitude #SpaceFacts #Distance #IntrinsicBrightness #Luminosity

...inter than they truly are.

#StellarAstronomy #InterstellarMedium #Extinction #SpaceFacts #ApparentMagnitude #IntrinsicLuminosity

... appear faint because they are incredibly distant.

#StellarAstronomy #StellarBrightness #Distance #SpaceFacts #ApparentMagnitude #IntrinsicLuminosity