#VariableStars
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astrododi.bsky.social
Close up of red giant star #V341 Carinae. Amazing structure around this variable star. For the full image of nearby #NGC2516, with spectacular nebulosity around it: flickr.com/photos/dodi-...
#astronomy #variablestars #astrophotography #spiderinourgalaxy
February 19, 2026 at 10:53 PM
wlsnyder.williamlsnyder.net
Very cool project! Amateur astronomers can collect data on variable stars. If you’re interested check out the AAVSO, aavso.org
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#astronomy #variablestars #aavso
May 15, 2025 at 3:42 AM
skyandtelescope.bsky.social
As we wait on recurrent nova T CrB, dwarf nova U Geminorum is teeing up for its next 5-magnitude outburst.
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#astronomy #stargazing #variablestars #novae #TCrB #nova
T CrB Not the Only Star Ready to Blow, Meet U Gem
As we wait on recurrent nova T CrB, dwarf nova U Geminorum is teeing up for its next 5-magnitude outburst.
buff.ly
March 26, 2025 at 6:14 PM
skyandtelescope.bsky.social
A new nova for early risers plus three fun observing projects for the week ahead.
buff.ly/MJDy0Pz
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#astronomy #stargazing #nova #occultation #planets #Jupiter #variablestars
New Nova in the Teapot, Algol Blinks, Uranus Occults a Star and More
A new nova for early risers plus three fun observing projects for the week ahead for amateurs of all skill levels.
buff.ly
April 2, 2025 at 4:01 PM
skyandtelescope.bsky.social
How a determined amateur astronomer may have hit on the identity of a Cepheid variable double star described by a beloved author.
skyandtelescope.org/astronomy-ne...
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#astronomy #stargazing #lesliepelteir #variablestars #doublestars
The Mystery of Leslie Peltier's "Two Tiny Diamonds"
How a determined amateur astronomer may have hit on the identity of a Cepheid variable double star described by a beloved author.
skyandtelescope.org
August 21, 2025 at 2:51 PM
davideiannone.bsky.social
The second paper of the "Eclipsing Binary Patrol" project, hosted on Zooniverse, is now on The Astronomical Journal.

The contribute of many people (and mine), in the support of the science and the researchers.

iopscience.iop.org/article/10.3...

#stellarastro #variablestars
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iopscience.iop.org
December 11, 2025 at 2:14 PM
davideiannone.bsky.social
The second pre-print from the Eclipsing Binary Patrol project on Zooniverse is available on arXiv!

@ebpatrol.bsky.social

Here is my contribution as a citizen scientist: we found 52 eclipsing quadruple star candidates.

arxiv.org/abs/2510.274...

#stellarastro
#variablestars
#eclipsingbinarystars
52 Eclipsing Quadruple Star Candidates Discovered in TESS Full Frame Images
We present the discovery of 52 eclipsing quadruple star candidates detected in TESS Full Frame Image eleanor data by machine learning and citizen scientists. The uniformly-vetted and -validated target...
arxiv.org
November 3, 2025 at 9:50 AM
skyandtelescope.bsky.social
Big, bright and red, the Mira variable R Leonis portends the Sun's fate. A pair of binoculars is all you need to get acquainted.
buff.ly/3EfJicS
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#astronomy #stargazing #leo #variablestars
Take a Look at R Leonis, Leo's Giant Ticker
Big, bright and red, the Mira variable R Leonis portends the Sun's fate. A pair of binoculars is all you need to get acquainted.
buff.ly
January 29, 2025 at 3:47 PM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “NGVS. XXXVII. RR Lyrae stars out to 300kpc” by Feng Y. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/966/159
#broadbandphotometry #visibleastronomy #infraredphotometry #variablestars
VizieR J/ApJ/966/159
cdsarc.cds.unistra.fr
September 20, 2026 at 6:46 AM
davideiannone.bsky.social
It was a beautiful day, the Gaia Vari seminar: the virtual meeting between Gaia Vari Team, the citizen scientists involved into this project, the great scientific results and the prizes!

www.youtube.com/live/SSWGlkS...

#esagaia
#gaiavari
#variablestars
#astronomy
#timedomainastronomy
#zooniverse
GaiaVari Seminar: Variable Stars with Gaia data and Citizen Scientists.
YouTube video by Sednai Sarl
www.youtube.com
February 3, 2025 at 6:05 PM
davideiannone.bsky.social
The first paper of the "Eclipsing Binary Patrol" project, hosted on Zooniverse, is now on the Astrophysical Journal Supplement Series.

The contribute of many people (and mine), in the support of the science and the researchers.

iopscience.iop.org/article/10.3...

#stellarastro #variablestars
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iopscience.iop.org
August 1, 2025 at 9:41 PM
joannesprott.bsky.social
Ignite from your dust and shadow,
the fire of your shine.

I want to see you in the night sky,
so I can find the way to my own light.

#variablestars #inspiration
Bright variable star surrounded by gas cloud. This is RS Puppies, captured by the Hubble Telescope.
October 26, 2025 at 11:53 PM
astronomybot.bsky.social
Variable stars change in brightness over time, often due to pulsations or eclipsing companions. Studying these changes helps astronomers understand stellar evolution and distances. #VariableStars #StellarBrightness #Astronomy
April 20, 2025 at 10:00 AM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “CO and CN in Cepheids” by Call S. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/545/F2216
#infraredsources #variablestars #chemicalabundances
VizieR J/MNRAS/545/F2216
cdsarc.cds.unistra.fr
January 15, 2026 at 5:30 PM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “NGC 7419 membership and variability” by Chakraborty A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/541/1866
#bestars #emissionlinestars #variablestars
VizieR J/MNRAS/541/1866
cdsarc.cds.unistra.fr
January 3, 2026 at 4:47 PM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “TPA pulsars observing and physical properties” by Posselt B. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/520/4582
#variablestars #interferometry #galaxykinematics #radiosources
VizieR J/MNRAS/520/4582
cdsarc.cds.unistra.fr
May 7, 2026 at 6:47 AM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “Parkes pulsar flux variabilities and modulations” by Wang Z. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/520/1311
#photometry #variablestars #stellardistance #galaxykinematics
VizieR J/MNRAS/520/1311
cdsarc.cds.unistra.fr
May 3, 2026 at 4:52 PM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “Rotation periods and ages of cool host stars” by Gaidos E. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/520/5283
#exoplanets #variablestars #visibleastronomy #spectroscopy
VizieR J/MNRAS/520/5283
cdsarc.cds.unistra.fr
May 9, 2026 at 6:52 AM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “NGC 5634 variable stars light curves” by Arellano Ferro A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/541/3146
#ccdphotometry #variablestars #globularstarclusters #visibleastronomy
VizieR J/MNRAS/541/3146
cdsarc.cds.unistra.fr
December 19, 2025 at 4:42 PM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “Study of ultra short period variable binary stars” by Koen C.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/516/2540
#variablestars #eclipsingBinaryStars #astrometry #photometry
VizieR J/MNRAS/516/2540
cdsarc.cds.unistra.fr
October 13, 2025 at 6:55 AM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “Study of TESS LCs RRc stars variation modes” by Benko J.M. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/521/443
#visibleastronomy #variablestars #asteroseismology #photometry
VizieR J/MNRAS/521/443
cdsarc.cds.unistra.fr
June 29, 2026 at 4:45 PM
sophiejaggers.bsky.social
While I was reading some papers about Przybylski's Star, I became interested in the mechanism of roAp stars. What is the cause of these pulsations? #Astrophysics #Stars #VariableStars #ChemicallyPeculiarStars
September 17, 2026 at 12:46 PM
gavo.fediscience.org.ap.brid.gy
New in the #VirtualObservatory: “NGC 7006's RR Lyrae physical properties” by Arellano Ferro A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/519/2451
#globularstarclusters #variablestars #photometry #visibleastronomy
VizieR J/MNRAS/519/2451
cdsarc.cds.unistra.fr
February 28, 2026 at 6:48 AM
davideiannone.bsky.social
Variable Stars from the Gaia DR3 Epoch Photometry by the G-band fluxes.

This is an amateur approach to the analysis of the light from a variable star.

Gaia DR3 409684702600599424
Coordinates (2016.0): 24.07735600488 , 56.47612360587

#variablestars #gaia #stellarastro
#gaiadr3_409684702600599424
*** Variable Stars from the Gaia DR3 Epoch Photometry by the G-band fluxes *** This is an amateur approach to the analysis of the light from a variable star The diagram shown here is the "phase plot" of the flux (in logarithmic scale, namely "magnitudes") from a star which brightness changes over time The X-axis represents the "phases of the oscillation": from the phase 0 to the phase 1 we explore the oscillation period in adimensional units Gaia DR3 409684702600599424 Position (epoch 2016.0): 24.07735600488 , 56.47612360587 RUWE (astrometric single-star parameter, 1=single): 0.968 Frequency (doubled for the Fourier Analysis): 3.025336 /d Standard Error of the Frequency: 0.000033999689 /d Period: 0.661083595342 d Semi-amplitude of the fundamental Fourier term: 0.191206586408 mag (G-band) Standard Error of the Semi-amplitude: 0.011810557294 mag (G-mag) Amplitude of the oscillation: 0.583695 mag (G-band) Morphological Class (my estimation): b1P (eclipsing binary star of Beta-Lyrae type, with positive O'Connell Effect - different maxima with the absolute maximum close to the orbital phase 0.25 if the absolute minimum was to the phases -1, 0, +1) Variability Class (from Gaia DR3 - Variability): ECL Credits: TOPCAT --> https://www.star.bris.ac.uk/~mbt/topcat/ VStar --> https://www.aavso.org/vstar TAP service --> https://gaia.aip.de/datalink/links Data table: gaiadr3.epoch_photometry Filter on the table: n_transits > 109 Gaia DR3 Part 1 - Main Table - I/355 (on VizieR) Gaia DR3 Variability - I/358 (on VizieR) Gaia DR3: This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The Power Spectrum, from the Discrete Fourier Transform Analysis, about the frequencies of the periodic signal from this variable star. The spectral frequency resolution was: 0.0005 /d Compare these frequency peaks with the ones of the Spectral Window (other diagram). The Power Spectrum, from the Discrete Fourier Transform Analysis, about the frequencies of the explored spectral window: these frequencies are "alias", not real. The spectral frequency resolution was: 0.0005 /d
July 13, 2025 at 4:34 PM
azoai.bsky.social
AstroM3 Transforms Astronomy With Multimodal AI for Stellar Insights 🌌🔭✨ www.azoai.com/news/2024111... #Astronomy #AI #MachineLearning #AstroTech #DataScience #VariableStars #AstroInnovation #SelfSupervisedLearning #Scientific @ucberkeleyofficial.bsky.social @berkeleylab.bsky.social
AstroM3 Transforms Astronomy With Multimodal AI for Stellar Insights
AstroM3, a self-supervised multimodal framework, integrates photometry, spectra, and metadata to transform astronomical data analysis. It improves classification, detects anomalies, and uncovers hidde...
www.azoai.com
November 20, 2024 at 12:09 AM