Investigador en @NASA. Astrofísico. Desarrollando telescopios espaciales en @NASAAmes. Galaxies and rocket science. @ESA @unicomplutense @IAC_astrofisica.
NASA Ames Research Center, CA
Joined November 2014
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By 2040, ~40% of the images from Hubble Space Telescope, and more than 96% from new and future space telescopes like SPHEREx, ARRAKIHS, and Xuntian will be contaminated by internet satellite constellations.
Read our new NASA article in Nature:
nature.com/articles/s41586-0…
Un mensaje para mis compatriotas en España desde Estados Unidos:
Si quereis llorar de impotencia porque un seguro no os aprueba los gastos para un tratamiento, votad por aquellos partidos que quieren recortar la sanidad pública.
La sanidad pública en España es una maravilla que no se entiende hasta que no sales fuera del país.
Trabajar todos juntos para ayudar al compañero que necesita recuperarse en el peor momento es el gesto mas patriotico que se puede tener. Hay que defenderla con uñas y dientes.
Alejandro S. Borlaff retweeted
Un mensaje para mis compatriotas en España desde Estados Unidos:
Si quereis llorar de impotencia porque un seguro no os aprueba los gastos para un tratamiento, votad por aquellos partidos que quieren recortar la sanidad pública.
Alejandro S. Borlaff retweeted
NASA Ames Stars of the Month: September 2026: The NASA Ames Science Directorate recognizes the outstanding contributions of (pictured left to right) Steve Ormsby, Aphrodite Kostakis, Alejando Borlaff, Sarah Nickerson, Martina Caussi, Keiko Nomura, and St… ift.tt/NQZq0wA
Alejandro S. Borlaff retweeted
🫣🔭 Les télescopes spatiaux submergés par les satellites ? Une étude menée par le centre NASA Ames révèle que 73,3% des images capturées par le télescope SPHEREx entre mai et septembre 2025 contenaient au moins une traînée de satellite artificiel…
📷 : Images de SPHEREx.
Alejandro S. Borlaff retweeted
Simulations forecast that... satellite trails will appear in up to 96% of the images obtained by space telescopes. SPHEREx observations obtained between May and September 2025 indicate that 73.3% of the images already show satellite trail contamination...
arxiv.org/abs/2605.27501
Alejandro S. Borlaff retweeted
SPHEREx confirms predictions for artificial satellite trail pollution in Low Earth Orbit
by A. S. Borlaff et al.
▶️ arxiv.org/abs/2605.27501
Alejandro S. Borlaff retweeted
"A new paper reports that 73.3% of images the agency’s new SPHEREx space telescope collected between May and September of last year were contaminated by at least one artificial satellite trail. And it’s only going to get worse from here."
universetoday.com/articles/s…
Alejandro S. Borlaff retweeted
A big community crowd viewed the historic Artemis II splashdown after a successful test flight around the Moon at NASA Ames Visitor Center @ChabotSpace on April 10.
This special event brought people together to explore the innovations behind the mission and meet the Ames experts that contributed research, engineering, and testing support for Artemis II.
ALT Community members watching the Artemis II splashdown at NASA Ames Visitor Center. Credit: NASA/ Brandon Torres
ALT Community members watching the Artemis II splashdown at NASA Ames Visitor Center. Credit: NASA/ Brandon Torres
ALT NASA\u2019s Orion spacecraft with Artemis II crewmembers NASA astronauts Reid Wiseman, commander; Victor Glover, pilot; Christina Koch, mission specialist; and CSA (Canadian Space Agency) astronaut Jeremy Hansen, mission specialist aboard is seen under parachutes as it lands in the Pacific Ocean off the coast of California, Friday, April 10, 2026. NASA\u2019s Artemis II mission took Wiseman, Glover, Koch, and Hansen on a 10-day journey around the Moon and back to Earth. Following a splashdown at , NASA, U.S. Navy, and U.S. Air Force teams are working to bring the crewmembers and Orion spacecraft aboard USS John P. Murtha.\n\nImage Credit: NASA/Bill Ingalls
Alejandro S. Borlaff retweeted
I've updated my megaconstellations list planet4589.org/space/con/con… with details of the planned Blue Origin Terawave system and the enormous CTC1 and CTC2 constellations China just filed with the ITU, for a total of almost 750,000 proposed satellites in the years to come.
Alejandro S. Borlaff retweeted
Satellite megaconstellations will threaten space-based astronomy: nature.com/articles/s41586-0… -> Planned satellite constellations may swamp future orbiting telescopes: arstechnica.com/science/2025… - planned orbital observatories would see satellites cross nearly all of their images.
Thanks to @ABC News for their fantastic interview and interest in the protection of the Dark Sky.
A new NASA-led study shows that the increasing number of satellites in low-Earth orbit could ruin up to 96% of images from some orbiting telescopes and space observatories. abcnews.link/nEPclYZ
Alejandro S. Borlaff retweeted
Light reflected from satellites pollutes the images taken by telescopes orbiting Earth, as well as those on the ground. Without mitigations, this will only get worse
go.nature.com/3Y2lW0S
Alejandro S. Borlaff retweeted
Humanity launched more satellites in the last four years than in the previous seven decades. Space-telescopes will see how most of their images get contaminated by reflections from internet satellite constellations. Read more behind the paper: spklr.io/6019B5pBF
Alejandro S. Borlaff retweeted
More than half a million satellites are planned to launch by the end of the 2030s, and simulations suggest they will have a severe impact on space-based astronomy newscientist.com/article/250…
Las megaconstelaciones de satélites de internet contaminarán el 40% de las imágenes del telescopio espacial Hubble y más del 96% de las observaciones de los telescopios SPHEREx, Xuntian, y ARRAKIHS.
Link a nuestro nuevo artículo en la revista Nature 👇:
nature.com/articles/s41586-0…
Hemos lanzado al espacio mas satélites en los últimos 4 años (2021 - 2025) que en las últimas siete decadas. Aunque la mayoría (75%) de los satélites son Starlink, muchos otros llegaran a órbita en los próximos años.