Oct 3, 2015

"SuperMoon" Total Lunar Eclipse - '15

Last weekend-ish we had the chance to witness a "perigee/super"-moon eclipse.
It was a great excuse to spend a night under the stars (it seems that I haven't done this for ages...).

So, here it is the result (more photos to follow!)

Taken at greatest/maximum eclipse.

(click on the photo to see it properly!)

Mar 20, 2015

Partial Solar Eclipse, March 20, 2015

What a great way to start Spring!
These were my (humble) attempts to capture the eclipse through some clouds.

 Taken through solar glasses. The "camera shake" ended up to produce a nice effect on the first shot.

Partial solar eclipse imaged using "pin hole" projection technique.

May 7, 2013

Orion served with Cheese

Orion constellation, Sirius and friends above Cheese Castle (Fort São Francisco Xavier), Porto, Portugal. The reddish gradient is due to light pollution from the city.
Taken with Canon 1000D, 18mm lens, in 14/March/2013. HDR composition.

Mar 15, 2013

1% of Moon

I took this photograph while I was looking for comet Pan-STARRS last Tuesday (12/Mar/13). The Moon was just beautiful, displaying a thin crescent, with its disk only 1% illuminated!

Mar 12, 2013

Welcome Comet Pan-STARRS

Although the weather wasn't very good, I managed to photograph Pan-STARRS between the clouds. I took this photo in the city of Porto, Portugal, facing the Atlantic Ocean which is perfect because there is nothing to obstruct the view. In addition, a ship was passing and the comet seems to be falling into it. Who wants to play Battleship?

Taken with Canon 1000D, 250mm lens at f/5.6, 2.5sec, ISO 400.

Dec 26, 2012

Christmas Conjunction: Jupiter & Moon

I just finished to process the images I took last night of the Jupiter-Moon conjunction. It was a bit cloudy over here but I managed to get a glimpse of the event between the clouds. The scene was already impressive with the naked eye but the view through the eyepiece was absolutely amazing! It's not everyday that one can see the belts of Jupiter and the craters on the Moon in the same field of view! The biggest planet in the Solar System and the biggest object in the night sky side by side. A Christmas to remember!

Fullsize: http://img819.imageshack.us/img819/3060/conjuctionmoonjuprv6cs6.jpg

Taken with SkyWatcher 80ED f/7.5 and Canon 1000D, 1/60s, ISO100. 26/December/2012 around 00h05 UT. From Vieira do Minho, Braga, Portugal.

"Blue Moon" selected for LPOD! (23/Dec/2012)

Dear friends,
I am glad to announce that my image of the fenomenon "Blue Moon" was selected to LPOD (Lunar Photo Of the Day) on the December 23rd. It is the 3rd image of mine selected for LPOD by Charles Wood.

"Charles Wood, a former NASA scientist who had studied the Moon and writes a monthly lunar column for Sky & Telescope, proposed starting the LPOD as an adjunct to his NASA-funded web site www.observingthesky.org. (...)
LPOD is based on the very successful Astronomy Picture of the Day, which contains a wonderful picture and brief caption each day with links for further information. APOD is viewed by millions of people around the world. It has sparked a wider interest in astronomy and the new understanding that comes with the beautiful images. (...)
All of these PODs provide an easy and quick way for astronomers - both amateur and professional - and the general public to stay in touch with emerging science and be awed by the beauty of the cosmos." - from LPOD website.

Permanet link: http://lpod.wikispaces.com/December+23%2C+2012

Dec 2, 2012

It's been a while...

...since I took my SPC900NC out of the box for some Solar System imaging. One day before opposition, I caught the King of Planets and two of its wonderful moons. The telescope wasn't properly collimated and seeing was poor...nevertheless, I am glad I spent a couple of hours outside looking through the eyepiece and to the screen with Jupiter dancing in the turbulence.
Note: It was freeeezzziiiiiinnngggg COLD! x)

(click on the image to enlarge)

Orion 8" reflector @f/10 and SPC900NC. Processed in AS!2+CS6. 23:14 UT, 1/Dec/12.

I found this apropied in this post: It's Been A While - Staind. xD

Sep 19, 2012

Today's EPOD - 19/Sep/2012

A minha fotografia nas Grutas de Sto António foi seleccionada para ser EPOD ( Earth Science Picture of the Day) de hoje, pelo Dr. James Foster da NASA's Earth Science Division. Espero que gostem!


Sep 1, 2012

Blue Moon

Canon 1000D, 250mm, 1/200s, f/5.6, ISO100.
"Ontem (31 de agosto de 2012) foi dia de Lua “Azul”, mas o nosso satélite natural não ficará, de facto, com cor azul.
Este nome serve apenas para designar a segunda Lua Cheia que ocorre no mesmo mês, algo se só se repete a cada 2 ou 3 anos. Isto porque o período sinódico da Lua (isto é, o tempo entre duas Luas Cheias consecutivas) é de 29,5 dias. Por isso uma Lua “Azul” só pode ocorrer em meses de 30 ou 31 dias (nunca em fevereiro), e a primeira tem de ocorrer no dia 1 ou 2 desse mês.
Esta definição de Lua “Azul” só começou a ser usada em 1946, já que a definição mais antiga definia a Lua “Azul” como a terceira de quatro Luas Cheias na mesma estação do ano (normalmente, por causa do período sinódico, só há 3 Luas Cheias em cada estação).
A raridade das luas azuis está na origem da expressão anglófona “Once in a Blue Moon” (traduzido literalmente, “uma vez a cada Lua azul”, o que significa um acontecimento raro).
A Lua “Azul” seguinte ocorrerá no dia 31 de julho de 2015."

Canon 1000D, 146mm, 1/50s, f/5, ISO800. 
Composição em HDR

Aug 23, 2012

Martian triangle and the Moon at the beach

I returned to the beach after the Sun went down to capture this awesome conjuction: Moon plus the "Marian triangle" formed by Mars, Saturn and Spica. The view at the beach was breathtaking! Canon 1000D, 30 sec, 400 ISO at Manta Rota, Algarve, Portugal in August 22th, 2012 at 22 pm.


Apr 19, 2011

Unequal weights fall with the same speed in a vacuum

"In his 1638 Discorsi Galileo's character Salviati, widely regarded as largely Galileo's spokesman, held that all unequal weights would fall with the same finite speed in a vacuum. (...) Galileo proposed that a falling body would fall with a uniform acceleration, as long as the resistance of the medium through which it was falling remained negligible, or in the limiting case of its falling through a vacuum."

Source: http://en.wikipedia.org/wiki/Galileo_Galilei

Apr 18, 2011

Wonders of the Universe

No APOD de hoje está um vídeo muito interessante que nos leva numa viagem pelos objectos celestes do nosso Cosmos. O vídeo foi criado pela BDH e a música por Timo Baker.
Today's APOD is not a picture but it is an amazing video which takes us in a journey throughout the Cosmos. The video was produced by  BDH and the music was composed by Timo Baker.
Link to APOD:  http://apod.nasa.gov/apod/ap110418.html

Apr 7, 2011

AAPOD 07/04/11: Biggest Moonrise in almost 20 years

É com agrado que vejo mais uma foto minha como AAPOD!
Link permanente:
I am glad that "my Super MoonRise" is today's AAPOD!
Permanet link:

Mar 31, 2011

NASA Announces 1235 Planet Candidates

NASA's Kepler mission has discovered its first Earth-size planet candidates and its first candidates in the habitable zone, a region where liquid water could exist on a planet's surface. Five of them are Earth-like. The findings increase the number of planet candidates identified by Kepler to-date to 1235. 170 stars show evidence of multiple planetary candidates 

Source:  http://kepler.nasa.gov/news/nasakeplernews/index.cfm?FuseAction=ShowNews&NewsID=98

Mar 20, 2011

LPOD: 20/Mar/2011 - Supermoonrise

LPOD: 20/Mar/2011

I am glad to see that my image sequence of the supermoonrise was selected to be today's LPOD (with Damian Peach's image too). It's "my" second LPOD (this was the first). The aparent diameter of this (almost) perigee moon (only 1h05min apart) was about 33.5'! Very impressive!

Here it is the permanet link to LPOD of 20/Mar/2011:

PS: Check  also Supermoon Photo Gallery from APOD's forum!

Biggest Moon in almost 20 years!

This animated (click in the pictures to start the animation) GIFs shows the "biggest moonrise" in almost 20 years! The moon had reached the perigee just 1h05min before I took the pictures. Prime focus in 8" f/5 reflector and Canon 1000D.



Color inverted

BW inverted

This video from NASA explains the phenomenon:

Dec 29, 2010

Amazing Storm on Saturn

This image taken by the Cassini (24/12/10) spacecraft shows the giant storm on Saturn. At it's current size the storm should be visible even with mid-sized amateur telescopes (in good seeing conditions). Also take a look at the image of the storm taken from Earth by Anthony Wesley: http://spaceweather.com/swpod2010/28dec10/wesley1.jpg?PHPSESSID=92s2crjldso0ucu0leq0a27pk6