Lmst

Cepheid Variable Star V1 in Andromeda Galaxy ✨

#NearbyGalaxies #Stars #UniverseAge/Size #VariableStars

⏩ 3 new pictures from Hubble (NASA) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=4&user=OptimusPrimeBot&ilshowall=1&offset=20250116090401

M31_Cepheid_Variable_Star_V1_(2025-001).jpg

M31_Cepheid_Variable_Star_V1_(2025-001).png

Compass_Scale_Image_of_V1_in_M31_(2025-001).jpg

In 1908, Henrietta S. Leavitt discovered that the period of a variable star could predict its brightness. This, starting in 1918, let astronomers measure the sizes of our galaxy and the observable universe. #Poetry #Science #History #Astronomy #VariableStars #Leavitt (https://sharpgiving.com/thebookofscience/items/p1918a.html)

Drawing of a diagram of space, featuring a horizontal gradient from light blue to light orange, five sections from top to bottom, and in this grid yellow and white segmented strings and some somewhat circular white areas.

We didn't have much to say about the #mythological #Cepheus (which is why this episode is actually about Io: https://starrytimepodcast.podbean.com/e/cepheus-myths-and-retconstellations/), but this #astrophotography from the #constellation #Cepheus (PV Cephei & Gyulbudaghian’s Nebula) is 🤩 🤩 🤩

For more on the #astronomy of this constellation: https://starrytimepodcast.podbean.com/e/cepheus-cosmic-background/

📷 :https://images.nasa.gov/details/GSFC_20171208_Archive_e001513

#podcast #AstroDon #Hubble #ESA #NASA #Space #Myth #GreekMythology #Io #StarLore #Constellations #VariableStars

Astrophotography image from the Hubble Space Telescope of PV Cephei and Gyulbudaghian’s Nebula. A bright star is in the center of the right side and a fan of blue, green, and white gas seems to be flowing behind the bright star across the image. Other stars and bright objects are scattered throughout the dark sky.

New in the #VirtualObservatory: “Cataclysmic variables in SRG/eROSITA surveys” by Schwope A.D. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/690/A243
#XRaySources #StellarDistance #CataclysmicVariableStars #VariableStars

New in the #VirtualObservatory: “Catalogue of Am/Fm Variability” by Durfeldt-Pedros O. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/690/A104
#VariableStars #EffectiveTemperature #VisibleAstronomy #Photometry

New in the #VirtualObservatory: “Terzan 5 variables light curves” by Figuera Jaimes R. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/689/A108
#VariableStars #VisibleAstronomy #Photometry #GlobularStarClusters

New in the #VirtualObservatory: “Kinematics of bulge RR Lyrae stars” by Olivares Carvajal J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/687/A312
#VariableStars #InfraredPhotometry #MilkyWayGalaxy #RadialVelocity

New in the #VirtualObservatory: “Variable stars in the NIR in nearby galaxies. I.” by Bhardwaj A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/167/247
#InfraredPhotometry #DwarfGalaxies #VariableStars

Light curve (Planetary science 🪐)

In astronomy, a light curve is a graph of the light intensity of a celestial object or region as a function of time, typically with the magnitude of light received on the y-axis and with time on the x-axis. The light is usually in a particular frequency interval or band. Light curves can be periodic, as in the case of eclipsing binaries, Cepheid variabl...

https://en.wikipedia.org/wiki/Light_curve

#LightCurve #VariableStars #PlanetaryScience #StellarAstronomy

New in the #VirtualObservatory: “VELOCE I. Cepheids High-precision RVs” by Anderson R.I. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/686/A177
#RadialVelocity #SpectroscopicBinaryStars #VariableStars

New in the #VirtualObservatory: “Close white dwarf binaries - Ref. samples” by Inight K. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/504/2420
#ProperMotions #TrigonometricParallax #CataclysmicVariableStars #VariableStars

New in the #VirtualObservatory: “Mira variable cand. in Milky Way NSD region” by Sanders J.L. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/530/2972
#Orbits #VariableStars #MilkyWayGalaxy #InfraredPhotometry

Hubble Sees a Brand New Triple Star System https://www.universetoday.com/167046/hubble-sees-a-brand-new-triple-star-system/ #hubblespacetelescope #stellarevolution #variablestars #variablestar #youngstar #taurus

New in the #VirtualObservatory: “Type II Cepheids in the Magellanic Clouds” by Sicignano T. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/685/A41
#VariableStars #InfraredPhotometry #VisibleAstronomy

New in the #VirtualObservatory: “RR Lyrae stars in Galactic Globular Clusters” by Cruz Reyes M. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/684/A173
#MilkyWayGalaxy #GlobularStarClusters #VariableStars #VisibleAstronomy

New in the #VirtualObservatory: “Radial velocities for 7 cataclysmic variables” by Thorstensen J.R. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/131
#RadialVelocity #Spectroscopy #VariableStars #VisibleAstronomy

New in the #VirtualObservatory: “Spot modeling of V1298 Tau using SpotCCF tool” by Di Maio C. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/683/A239
#VariableStars #Spectroscopy #StellarActivity

I measured the change of brightness of the star RR Gem, and it is mind boggling.

RR Gem is an intrinsic variable star. And is intrinsic because internal physical processes change its radial size and opacity. It is, in other words, a pulsating variable star. Its formal type is RRab. This is an RR Lyr type of variable star, and most of them can be found in globular star clusters (that's why they are called cluster variables).

#Astrodon #science #stars #astronomy #variablestars #rrlyr