* Astronomy

Blobrana · L

RE: April 25th

Blobrana · L

The Romans celebrated the heliacal setting of Sirius around April 25
http://en.wikipedia.org/wiki/Sirius

In ancient Roman religion, the Robigalia was a festival held April 25.
http://en.wikipedia.org/wiki/Robigalia

DNA Day is a holiday celebrated on April 25.
http://en.wikipedia.org/wiki/DNA_Day

Blobrana · L

The Gallipoli Campaign was a WWI campaign that took place between 25 April 1915 and 9 January 1916.
http://en.wikipedia.org/wiki/Battle_of_Gallipoli

Peloponnesian War: Athens surrendered to Sparta in 404 BC
http://en.wikipedia.org/wiki/Peloponnesian_War#Lysander_triumphs.2C_Athens_surrenders

The final piece of the Obelisk of Axum was returned to Ethiopia on the 25th April, 2005
http://astronomy.activeboard.com/t7879574/axum-obelisk/

Operation Sandblast was the code name for the first submerged circumnavigation of the world
http://astronomy.activeboard.com/t42737460/operation-sandblast/

Blobrana · L

The Cassegrain reflecting telescope design appeared in the April 25, 1672 Journal des scavans
http://en.wikipedia.org/wiki/Laurent_Cassegrain#Connection_with_the_Cassegrain_reflector

The Kielder Observatory was officially opened on the 25 April 2008
http://en.wikipedia.org/wiki/Kielder_Observatory

Blobrana · L

The first flight of the Stratospheric Observatory for Infrared Astronomy was on April 25, 1977
http://en.wikipedia.org/wiki/Stratospheric_Observatory_for_Infrared_Astronomy

The deployment of the Hubble Space Telescope in 1990

The EROS B satellite was launched on April 25, 2006.
http://en.wikipedia.org/wiki/EROS_B

On April 25, 2007, the AIM satellite (Aeronomy of Ice in the Mesosphere) was launched.
http://en.wikipedia.org/wiki/Aeronomy_of_Ice_in_the_Mesosphere

Blobrana · L

Felix Alexandrovich Berezin (25 April 1931 - 14 July 1980) was a Soviet Russian mathematician
http://en.wikipedia.org/wiki/Felix_Berezin

Nikolai Semenovich Kardashev (born April 25, 1932) is a Russian (formerly Soviet) astrophysicist
http://en.wikipedia.org/wiki/Nikolai_Kardashev

Guglielmo Marconi (25 April 1874 - 20 July 1937) was an Italian inventor
http://en.wikipedia.org/wiki/Guglielmo_Marconi

Edouard-Léon Scott de Martinville (25 April 1817 - 26 April 1879) was a French printer and bookseller who lived in Paris.
http://en.wikipedia.org/wiki/%C3%89douard-L%C3%A9on_Scott_de_Martinville

James Ferguson (25 April 1710 - 17 November 1776) was a Scottish astronomer and instrument maker.
http://en.wikipedia.org/wiki/James_Ferguson_(1710-1776)

Gérard Henri de Vaucouleurs (25 April 1918 - 7 October 1995) was a French astronomer.
http://astronomy.activeboard.com/t48870268/grard-de-vaucouleurs-1918-1995/

Sir Francis Graham-Smith (born 25 April 1923) is a British astronomer.
http://en.wikipedia.org/wiki/Francis_Graham-Smith

Blobrana · L

NGC 4731 was discovered by William Herschel on the 25th April 1784.
http://astronomy.activeboard.com/t57385917/ngc-4731/

NGC 4928 was discovered by William Herschel on the 25th April 1784.
http://astronomy.activeboard.com/t57385916/ngc-4928/

NGC 5414 was discovered by Ernst Wilhelm Leberecht Tempel on the 25th April 1883.
http://astronomy.activeboard.com/t57385907/ngc-5414/

NGC 5423 was discovered by Ernst Wilhelm Leberecht Tempel on the 25th April 1883.
http://astronomy.activeboard.com/t57385904/ngc-5423/

Blobrana · L

GRB 980425 was a gamma-ray burst (GRB) that was detected on 25 April 1998.
http://en.wikipedia.org/wiki/GRB_980425

Cas XR-1 was discovered by an Aerobee rocket flight on April 25, 1965
http://en.wikipedia.org/wiki/Cassiopeia_A#X-ray_source

On 25 April 2008, NASA's Swift satellite picked up a record-setting flare from EV Lacertae.
http://en.wikipedia.org/wiki/EV_Lacertae

Comet 9P/Tempel imaged on April 25 2005 by the Deep Impact spacecraft
http://en.wikipedia.org/wiki/File:PIA07879.jpg

Asteroid (9) Metis was discovered by Andrew Graham on 25 April 1848, at Markree Observatory in Ireland
http://en.wikipedia.org/wiki/9_Metis

Asteroid (291) Alice was discovered by Johann Palisa on April 25, 1890 at the Vienna Observatory.
https://en.wikipedia.org/wiki/291_Alice

Asteroid (292) Ludovica was discovered by Johann Palisa on April 25, 1890 in Vienna.
https://en.wikipedia.org/wiki/292_Ludovica

Asteroid (599) Luisa was discovered on April 25, 1906 by Joel Hastings Metcalf
http://en.wikipedia.org/wiki/599_Luisa

Asteroid 1922 Zulu (1949 HC) was discovered on April 25, 1949 by Ernest Leonard Johnson
http://en.wikipedia.org/wiki/1922_Zulu

Title: The Fireball of April 25, 1966. II, Photographic Observations and Orbit Determination
http://astronomy.activeboard.com/t53471479/fireball-of-april-25-1966/

Blobrana · L

Meteorites

Kiama 25 April 1880 meteor
http://astronomy.activeboard.com/t57386716/kiama-25-april-1880-meteor/

The Novy-Projekt (OC) meteorite fell in Lithuania, on the 25th April, 1908.
http://astronomy.activeboard.com/t48870217/novy-projekt-meteorite/

Anniversary of the Bovedy meteorite fall in Northern Ireland on April 25, 1969.
http://astronomy.activeboard.com/t27314325/bovedy-meteorite/

The Kabo (H4) meteorite fell in Kano, Nigeria, on the 25th April, 1971.
http://astronomy.activeboard.com/t48870219/kabo-meteorite/