Majadahonda Astronomical Observatory

The solar cycle 25 started in 2020 and a maximum of activity is expected for 2025. In January 2021, specifically on the 16th, a new group...

I am very grateful to the AAVSO (The American Association of Variable Star Observers) for recognizing my contribution of over 500...

On December 21, 2021, the Great Conjunction of Jupiter and Saturn took place, expected by all the fans, but illusion truncated at least...

I have added in the "Projects" section, a new work DIY. The goal is to make Digital Setting Circles that will improve the visual...

Thanks to the helpful service of CalSky Alerter (https://www.calsky.com/) I received an email informing me that the ISS could be seen...

On June 19, 2020, the Moon occulted Venus for more than an hour. The trajectory of both along the ecliptic crossed. This phenomenon is...

You might think that when we look through the telescope to see or photograph the full moon we always see the same image, but the fact is...

The conjunction of Venus and Mercury took place this month of May 2020 at 9:44 local time, Venus passing through the north of Mercury at...

Every year Venus passes close to the Pleiades cluster (M45), but only every 8 years a perfect conjunction is produced, crossing the...

Venus is in an optimal position for observation when it is at its maximum elongation, i.e. when the angle between the Sun and Venus as...

Currently, the transits of Mercury take place in May (near its passage through the descending node) or in November (near its passage...

Iceland is an incredible destination to see nature. At the end of August, the conditions are excellent to enjoy the amazing landscapes of...

If you are interested in photometric or astrometric measurements with your equipment, you can get high precision in the timing of your...

Already Hipparchus of Nicea around 150 B.C. relied on the shadow of the Earth on the Moon during lunar eclipses to calculate the relative...

Today is August 4, 2019, and since July 25 the sun shows no sunspots or active regions on the visible surface towards the Earth. They are...

On July 16, 2019 there was a partial eclipse of the moon. The photo shows a moment of the eclipse, photographed from Majadahonda (Madrid)...

Building a stellar photometer clearly goes against the current trend. Almost all amateur photometrists use CCD cameras, and yet I have...

During the total eclipse of the moon on July 27, 2018, the Madrid Planetarium organized an observation in its esplanade with telescopes...

The images that the AllSky camera captures are a great help to know the current state of the sky. Being the camera in color we can...

During the months of November and December 2017, I dedicated the newly built Mini Observatory to the search for variable stars, finding 6...