Xavi Bros
@xavi-bros.bsky.social
Amateur Astronomer. Anysllum Observatory owner. AstroSabadell member. Psychologist pursuing a Psychiatry Phd. Author of “En las playas de Sedna”.
Pinned
Xavi Bros
@xavi-bros.bsky.social
· Mar 12
The Andromeda Galaxy (M31) is a barred spiral galaxy and is the nearest major galaxy to the Milky Way, 2.5 million light-years from Earth.
Image by Xavier Bros (AstroSabadell) with the second setup of the Anysllum Observatory. Exposure 5,25 hours.
Image by Xavier Bros (AstroSabadell) with the second setup of the Anysllum Observatory. Exposure 5,25 hours.
The 23th exoplanet transit measured!
TOI-1728b is a Neptune-like exoplanet that orbits a K-type star situated 198 lightyears far. Its mass is 26.78 Earths. The brightness gap detected is 0,007 magnitudes!
Observation done from the “Anysllum Observatory” by Xavier & Jordi Bros.
TOI-1728b is a Neptune-like exoplanet that orbits a K-type star situated 198 lightyears far. Its mass is 26.78 Earths. The brightness gap detected is 0,007 magnitudes!
Observation done from the “Anysllum Observatory” by Xavier & Jordi Bros.
November 24, 2025 at 6:24 AM
The 23th exoplanet transit measured!
TOI-1728b is a Neptune-like exoplanet that orbits a K-type star situated 198 lightyears far. Its mass is 26.78 Earths. The brightness gap detected is 0,007 magnitudes!
Observation done from the “Anysllum Observatory” by Xavier & Jordi Bros.
TOI-1728b is a Neptune-like exoplanet that orbits a K-type star situated 198 lightyears far. Its mass is 26.78 Earths. The brightness gap detected is 0,007 magnitudes!
Observation done from the “Anysllum Observatory” by Xavier & Jordi Bros.
NGC 2403 (Caldwell 7) is a spiral galaxy “only” 8 million lightyears distant. It’s very similar to M33. In this LHaRGB image you can see several star-forming HII regions.
(16h of integration from Anysllum Observatory (X.Bros-J.Zapata) processed by J.Zapata! AstroSabadell).
(16h of integration from Anysllum Observatory (X.Bros-J.Zapata) processed by J.Zapata! AstroSabadell).
November 22, 2025 at 6:40 PM
NGC 2403 (Caldwell 7) is a spiral galaxy “only” 8 million lightyears distant. It’s very similar to M33. In this LHaRGB image you can see several star-forming HII regions.
(16h of integration from Anysllum Observatory (X.Bros-J.Zapata) processed by J.Zapata! AstroSabadell).
(16h of integration from Anysllum Observatory (X.Bros-J.Zapata) processed by J.Zapata! AstroSabadell).
A group of galaxies around NGC 7331, 40 million lightyears far. The main galaxy is an unbarred spiral with a diameter of 120000 lightyears, similar to MilkyWay.
Image done by Xavier Bros and Jaume Zapata, AstroSabadell members, from the remote-operated "Anysllum" observatory.
Image done by Xavier Bros and Jaume Zapata, AstroSabadell members, from the remote-operated "Anysllum" observatory.
November 3, 2025 at 2:03 PM
A group of galaxies around NGC 7331, 40 million lightyears far. The main galaxy is an unbarred spiral with a diameter of 120000 lightyears, similar to MilkyWay.
Image done by Xavier Bros and Jaume Zapata, AstroSabadell members, from the remote-operated "Anysllum" observatory.
Image done by Xavier Bros and Jaume Zapata, AstroSabadell members, from the remote-operated "Anysllum" observatory.
An incredible image of C/2025 A6 (Lemmon) by Tobias Swaczyna.
Enjoy it‼️
Enjoy it‼️
October 26, 2025 at 7:24 AM
An incredible image of C/2025 A6 (Lemmon) by Tobias Swaczyna.
Enjoy it‼️
Enjoy it‼️
The most difficult exoplanet transit I could observe until now:
K2-285c, a neptune-like around a K star 500 lightyears far.
Detected a tiny disminution of brightness of only 2,3 thousandths of a magnitude‼️The light curve is not beautiful but it’s a challenge achieved.
K2-285c, a neptune-like around a K star 500 lightyears far.
Detected a tiny disminution of brightness of only 2,3 thousandths of a magnitude‼️The light curve is not beautiful but it’s a challenge achieved.
October 22, 2025 at 3:34 PM
The most difficult exoplanet transit I could observe until now:
K2-285c, a neptune-like around a K star 500 lightyears far.
Detected a tiny disminution of brightness of only 2,3 thousandths of a magnitude‼️The light curve is not beautiful but it’s a challenge achieved.
K2-285c, a neptune-like around a K star 500 lightyears far.
Detected a tiny disminution of brightness of only 2,3 thousandths of a magnitude‼️The light curve is not beautiful but it’s a challenge achieved.
M52 is a rich open cluster with a mass of about 1200 suns. As usual in open clusters is very “young” (age 158 million years…).
Image taken from the amateur observatory Anysllum @AstroSabadell with a 35cm telescope and 45min exp in each RGB filter.
Image taken from the amateur observatory Anysllum @AstroSabadell with a 35cm telescope and 45min exp in each RGB filter.
October 20, 2025 at 9:43 PM
M52 is a rich open cluster with a mass of about 1200 suns. As usual in open clusters is very “young” (age 158 million years…).
Image taken from the amateur observatory Anysllum @AstroSabadell with a 35cm telescope and 45min exp in each RGB filter.
Image taken from the amateur observatory Anysllum @AstroSabadell with a 35cm telescope and 45min exp in each RGB filter.
See this amazing Venus image done by NASA's Parker Solar Probe in its trip to the Sun in 2021.
It is possible to see some Venus details through its clouds‼️
It is possible to see some Venus details through its clouds‼️
October 18, 2025 at 12:54 PM
See this amazing Venus image done by NASA's Parker Solar Probe in its trip to the Sun in 2021.
It is possible to see some Venus details through its clouds‼️
It is possible to see some Venus details through its clouds‼️
How is our Galaxy’s shape?
The MilkyWay is a barred spiral galaxy with about 200000-400000 million stars… our sun is 30000 lightyears from the center where is a black hole.
Sun's Galactic rotation period is about 240 M years!
Image: Illustration by R.Hurt, JPL-Caltech, NASA
The MilkyWay is a barred spiral galaxy with about 200000-400000 million stars… our sun is 30000 lightyears from the center where is a black hole.
Sun's Galactic rotation period is about 240 M years!
Image: Illustration by R.Hurt, JPL-Caltech, NASA
October 15, 2025 at 6:40 PM
How is our Galaxy’s shape?
The MilkyWay is a barred spiral galaxy with about 200000-400000 million stars… our sun is 30000 lightyears from the center where is a black hole.
Sun's Galactic rotation period is about 240 M years!
Image: Illustration by R.Hurt, JPL-Caltech, NASA
The MilkyWay is a barred spiral galaxy with about 200000-400000 million stars… our sun is 30000 lightyears from the center where is a black hole.
Sun's Galactic rotation period is about 240 M years!
Image: Illustration by R.Hurt, JPL-Caltech, NASA
A moon over the sky of Mars:
In this Martian skyscape the brightest object is Deimos, the smallest of Mars’ two moons.
This image was taken before sunrise by Perseverance rover on March 1, 2025.
Image: NASA via APOD.
In this Martian skyscape the brightest object is Deimos, the smallest of Mars’ two moons.
This image was taken before sunrise by Perseverance rover on March 1, 2025.
Image: NASA via APOD.
October 15, 2025 at 1:05 AM
A moon over the sky of Mars:
In this Martian skyscape the brightest object is Deimos, the smallest of Mars’ two moons.
This image was taken before sunrise by Perseverance rover on March 1, 2025.
Image: NASA via APOD.
In this Martian skyscape the brightest object is Deimos, the smallest of Mars’ two moons.
This image was taken before sunrise by Perseverance rover on March 1, 2025.
Image: NASA via APOD.
Communication with alien life:
Very different cognition, culture and language could be as difficult or more than technology or distance to communicate with them.
Image: movie The Arrival
Very different cognition, culture and language could be as difficult or more than technology or distance to communicate with them.
Image: movie The Arrival
October 12, 2025 at 10:01 PM
Communication with alien life:
Very different cognition, culture and language could be as difficult or more than technology or distance to communicate with them.
Image: movie The Arrival
Very different cognition, culture and language could be as difficult or more than technology or distance to communicate with them.
Image: movie The Arrival
The exoplanet Kepler-76b is situated 2684 lightyears far. Its a hot jupiter (mass of 2 Jupiters).
This transit observation was done from the Teide observatory, telescope IAC 80, by the IAC-AstroSabadell team‼️
This transit observation was done from the Teide observatory, telescope IAC 80, by the IAC-AstroSabadell team‼️
October 12, 2025 at 9:52 PM
The exoplanet Kepler-76b is situated 2684 lightyears far. Its a hot jupiter (mass of 2 Jupiters).
This transit observation was done from the Teide observatory, telescope IAC 80, by the IAC-AstroSabadell team‼️
This transit observation was done from the Teide observatory, telescope IAC 80, by the IAC-AstroSabadell team‼️
The Messier 11 open cluster (“the wild duck”), is a compact, metal rich cluster situated 6120 lightyears far.
A beautiful contrast of its young stars with the more diverse stars of the rich Milky Way backgroud:
Image from the Anysllum Observatory, 90 minutes of RGB exposure.
A beautiful contrast of its young stars with the more diverse stars of the rich Milky Way backgroud:
Image from the Anysllum Observatory, 90 minutes of RGB exposure.
October 8, 2025 at 4:29 AM
The Messier 11 open cluster (“the wild duck”), is a compact, metal rich cluster situated 6120 lightyears far.
A beautiful contrast of its young stars with the more diverse stars of the rich Milky Way backgroud:
Image from the Anysllum Observatory, 90 minutes of RGB exposure.
A beautiful contrast of its young stars with the more diverse stars of the rich Milky Way backgroud:
Image from the Anysllum Observatory, 90 minutes of RGB exposure.
Neptune, it’s wonderful rings and the main moon of this system, Triton, in a memorable image by the James Web Space Telescope… beautiful ‼️
October 8, 2025 at 3:24 AM
Neptune, it’s wonderful rings and the main moon of this system, Triton, in a memorable image by the James Web Space Telescope… beautiful ‼️
Isaac Asimov:
“Don't you believe in flying saucers? in telepathy? in life after death?
No, I reply. No and no.
I believe in evidence, in observation confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it.”
“Don't you believe in flying saucers? in telepathy? in life after death?
No, I reply. No and no.
I believe in evidence, in observation confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it.”
September 27, 2025 at 1:57 PM
Isaac Asimov:
“Don't you believe in flying saucers? in telepathy? in life after death?
No, I reply. No and no.
I believe in evidence, in observation confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it.”
“Don't you believe in flying saucers? in telepathy? in life after death?
No, I reply. No and no.
I believe in evidence, in observation confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it.”
Observed 16 exoplanet transits from the Anysllum Observatory:
Last one was XO-7 b: a gas giant exoplanet that orbits an F-type star. Its mass is 0.709 Jupiters.
Its star is situated 764 lightyears far‼️
During the transit the star is only 0.01 magnitudes fainter‼️
Last one was XO-7 b: a gas giant exoplanet that orbits an F-type star. Its mass is 0.709 Jupiters.
Its star is situated 764 lightyears far‼️
During the transit the star is only 0.01 magnitudes fainter‼️
September 19, 2025 at 6:52 AM
Observed 16 exoplanet transits from the Anysllum Observatory:
Last one was XO-7 b: a gas giant exoplanet that orbits an F-type star. Its mass is 0.709 Jupiters.
Its star is situated 764 lightyears far‼️
During the transit the star is only 0.01 magnitudes fainter‼️
Last one was XO-7 b: a gas giant exoplanet that orbits an F-type star. Its mass is 0.709 Jupiters.
Its star is situated 764 lightyears far‼️
During the transit the star is only 0.01 magnitudes fainter‼️
The galaxy cluster of Coma Berenice, Abell 1656, is situated 320 million lightyears far… and has about 1000 galaxies‼️
How many do you see in this image behind the blue bright stars of our own galaxy?
18 hours of LRGB exposure from the Anysllum Observatory, AstroSabadell.
How many do you see in this image behind the blue bright stars of our own galaxy?
18 hours of LRGB exposure from the Anysllum Observatory, AstroSabadell.
September 11, 2025 at 3:58 AM
The galaxy cluster of Coma Berenice, Abell 1656, is situated 320 million lightyears far… and has about 1000 galaxies‼️
How many do you see in this image behind the blue bright stars of our own galaxy?
18 hours of LRGB exposure from the Anysllum Observatory, AstroSabadell.
How many do you see in this image behind the blue bright stars of our own galaxy?
18 hours of LRGB exposure from the Anysllum Observatory, AstroSabadell.
The universe is expanding at different rates‼️
According a research using JWST data: the Hubble constant could be different when we observe in different directions:
www.livescience.com/space/cosmol...
According a research using JWST data: the Hubble constant could be different when we observe in different directions:
www.livescience.com/space/cosmol...
September 8, 2025 at 6:23 AM
The universe is expanding at different rates‼️
According a research using JWST data: the Hubble constant could be different when we observe in different directions:
www.livescience.com/space/cosmol...
According a research using JWST data: the Hubble constant could be different when we observe in different directions:
www.livescience.com/space/cosmol...
When bright & dark nebulae met with open clusters, we see huge views: Melotte 15 -part of Heart Nebula- with bright stars between gas & dust!
Anysllum observatory image obtained after 21 hours of SHO-LRGB by Xavier Bros & Jaume Zapata both members of AstroSabadell.
Anysllum observatory image obtained after 21 hours of SHO-LRGB by Xavier Bros & Jaume Zapata both members of AstroSabadell.
September 6, 2025 at 5:25 PM
When bright & dark nebulae met with open clusters, we see huge views: Melotte 15 -part of Heart Nebula- with bright stars between gas & dust!
Anysllum observatory image obtained after 21 hours of SHO-LRGB by Xavier Bros & Jaume Zapata both members of AstroSabadell.
Anysllum observatory image obtained after 21 hours of SHO-LRGB by Xavier Bros & Jaume Zapata both members of AstroSabadell.
GEORGE ORWELL:
“Who controls the past controls the future. Who controls the present controls the past.”
“In a time of deceit telling the truth is a revolutionary act.”
“The past was erased, the erasure was forgotten, the lie became the truth.”
“Who controls the past controls the future. Who controls the present controls the past.”
“In a time of deceit telling the truth is a revolutionary act.”
“The past was erased, the erasure was forgotten, the lie became the truth.”
September 6, 2025 at 7:55 AM
GEORGE ORWELL:
“Who controls the past controls the future. Who controls the present controls the past.”
“In a time of deceit telling the truth is a revolutionary act.”
“The past was erased, the erasure was forgotten, the lie became the truth.”
“Who controls the past controls the future. Who controls the present controls the past.”
“In a time of deceit telling the truth is a revolutionary act.”
“The past was erased, the erasure was forgotten, the lie became the truth.”
Today, 48 years ago, Voyager 1 was launched to study Jupiter and Saturn. Today, Voyager 1 is about 25000 million km from Earth‼️
Images: NASA
Images: NASA
September 6, 2025 at 2:16 AM
Today, 48 years ago, Voyager 1 was launched to study Jupiter and Saturn. Today, Voyager 1 is about 25000 million km from Earth‼️
Images: NASA
Images: NASA
The Sunflower Galaxy, M63, is a non-barred spiral galaxy, 29 million lightyears far.
See here many features in its spiral structure and its incredible dusty band.
10 hours LRGBH image by Jaume Zapata & Xavier Bros, Anysllum Observatory, AstroSabadell.
Procesed by Jaume Zapata.
See here many features in its spiral structure and its incredible dusty band.
10 hours LRGBH image by Jaume Zapata & Xavier Bros, Anysllum Observatory, AstroSabadell.
Procesed by Jaume Zapata.
September 3, 2025 at 2:39 PM
The Sunflower Galaxy, M63, is a non-barred spiral galaxy, 29 million lightyears far.
See here many features in its spiral structure and its incredible dusty band.
10 hours LRGBH image by Jaume Zapata & Xavier Bros, Anysllum Observatory, AstroSabadell.
Procesed by Jaume Zapata.
See here many features in its spiral structure and its incredible dusty band.
10 hours LRGBH image by Jaume Zapata & Xavier Bros, Anysllum Observatory, AstroSabadell.
Procesed by Jaume Zapata.
Astronomers have observed one of the brightest fast radio bursts to date and pinpointed its origin to a star-forming region in a the spiral galaxy NGC 4142. These millisecond-long radio bursts originate from the highly magnetized remnants of massive stars.
Image:
D.Futselaar/MMT
Image:
D.Futselaar/MMT
August 31, 2025 at 12:29 PM
Astronomers have observed one of the brightest fast radio bursts to date and pinpointed its origin to a star-forming region in a the spiral galaxy NGC 4142. These millisecond-long radio bursts originate from the highly magnetized remnants of massive stars.
Image:
D.Futselaar/MMT
Image:
D.Futselaar/MMT
WISPIT 2b: when an Exoplanet Carves a Gap in its Birth disk.
At the center lies a young Sun-like star. Surrounding the star is a bright, dusty protoplanetary disk where the new planet is clearing the way as it orbits the star.
Image: ESO, Richelle van Capelleveen via APOD web.
At the center lies a young Sun-like star. Surrounding the star is a bright, dusty protoplanetary disk where the new planet is clearing the way as it orbits the star.
Image: ESO, Richelle van Capelleveen via APOD web.
August 27, 2025 at 7:34 PM
WISPIT 2b: when an Exoplanet Carves a Gap in its Birth disk.
At the center lies a young Sun-like star. Surrounding the star is a bright, dusty protoplanetary disk where the new planet is clearing the way as it orbits the star.
Image: ESO, Richelle van Capelleveen via APOD web.
At the center lies a young Sun-like star. Surrounding the star is a bright, dusty protoplanetary disk where the new planet is clearing the way as it orbits the star.
Image: ESO, Richelle van Capelleveen via APOD web.
Quasar S50014+81 is one of the most luminous objects known in the universe: 3 trillion suns (25000 Milky Way’s combined light!). Its black hole devours 4000 sun masses/year: buff.ly/2Lrj5Nw.
Images: Right, illustration by NASA. Left, real image by Xavier Bros, Anysllum.
Images: Right, illustration by NASA. Left, real image by Xavier Bros, Anysllum.
August 22, 2025 at 8:19 AM
Quasar S50014+81 is one of the most luminous objects known in the universe: 3 trillion suns (25000 Milky Way’s combined light!). Its black hole devours 4000 sun masses/year: buff.ly/2Lrj5Nw.
Images: Right, illustration by NASA. Left, real image by Xavier Bros, Anysllum.
Images: Right, illustration by NASA. Left, real image by Xavier Bros, Anysllum.
Jupiter moon Callisto has a subsurface frozen/liquid ocean as other bodies (Europa, Encelado...). The Callisto's one dissipates energy due to obliquity tides. This explains its orbital inclination & eccentricity according this 2020 study:
bit.ly/3mjduWQ
Images: NASA
bit.ly/3mjduWQ
Images: NASA
August 11, 2025 at 11:10 PM
Jupiter moon Callisto has a subsurface frozen/liquid ocean as other bodies (Europa, Encelado...). The Callisto's one dissipates energy due to obliquity tides. This explains its orbital inclination & eccentricity according this 2020 study:
bit.ly/3mjduWQ
Images: NASA
bit.ly/3mjduWQ
Images: NASA