|
|
 |
|
 |
 |
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
.
On this day in 1978 – February 22nd – the first Navstar GPS satellite was launched.
Navstar GPS was what is now called the Global Positioning System (GPS).
.
|
|
|
|
 |
 |
|
 |
|
|
|
|
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
. On this day in 1945 – February 23rd – Ukrainian astronomer Svetlana Gerasimenko was born in Baryshivka, Ukraine.Gerasimenko's name is well known because she was the co-discoverer of comet 67P/Churyumov-Gerasimenko. This was the comet explored by the Rosetta mission . Both the Rosetta spacecraft and its lander Philae are on the comet as it continues to orbit the Sun..
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
. On this day in 1987 – February 23rd – the light from supernova SN 1987A reached Earth.The supernova occurred in the Tarantula Nebula in our neighboring galaxy the Large Magellanic Cloud. It was the closest supernova seen in nearly four hundred years, visible to the unaided eye in the southern hemisphere. It has greatly increased our understanding of this spectacular phenomenon..
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
.
On this day in 1990 – February 23rd – Pioneer 11 crossed the orbit of Neptune on its way out of the Solar System.
On that date, the spacecraft went beyond the most distant planet. However, since there are dwarf planets and many other objects beyond Neptune, the spacecraft still hadn't left the Solar System. It's now nearly 112 times farther from the Sun than the Earth is.
.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
. On this day in 1968 – February 24th – the discovery of the first pulsar was announced. However, it wasn't until later that astronomers understood what the object was and gave it its name.We now know that the mystery objects are fast-rotating neutron stars that emits a beam of electromagnetic radiation. We can only detect one when it's pointing towards us, rather like a lighthouse, so it seems to pulse. A neutron star is the remnant of a massive star following the collapse of its core in a supernova explosion..
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
.
On this day in 1670 – February 25th – German astronomer Maria Margarethe Kirch (née Winckelmann) was born in Panitzsch near Leipzig.
Maria made extensive observations and published accounts of them. She was the first woman now known to have discovered a comet. However, her husband – a well known astronomer – was given the credit.
.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
. On this day in 1786 – February 26th – François Arago was born at Estagel near Perpignan in France.This extraordinary man was a prominent astronomer, mathematician and physicist, as well as an enlightened politician. He aided in the project of surveying the Paris meridian, and later served as director of the Paris Observatory for over twenty years..
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
. On this day in 1842 – February 26th – Camille Flammarion, French astronomer and author, was born in Val-de-Meuse.Flammarion produced over fifty books, including popular books on astronomy, and also some early science fiction novels..
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
.
On this day in 1897 – February 27th – French astronomer Bernard Lyot was born in Paris.
Bernard Lyot's work brought him major international awards. His most important contributions to astronomy were in solar observing, especially the invention of the coronagraph which makes it possible to observe the Sun's corona without waiting for a total eclipse.
.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Joined: May 2010
Posts: 11,948 Likes: 30
BellaOnline Editor Renaissance Human
|
|
OP
BellaOnline Editor Renaissance Human
Joined: May 2010
Posts: 11,948 Likes: 30 |
.
On this day in 2007 – February 28th – the New Horizons spacecraft flew past Jupiter en route to Pluto.
New Horizons made over 700 observations of the Jovian system, but the main reason for the flyby was to carry out a gravity assist maneuver. That boosted the speed of the spacecraft to get it to Pluto five years earlier than it would have otherwise.
.
|
|
|
|
|
|
|
|
|
|
|
|
|
We take forum safety very seriously here at BellaOnline. Please be sure to read through our Forum Guidelines. Let us know if you have any questions or comments!
|
|
|
|
|
|
|
|
|
|
|
|
This forum uses cookies to ensure smooth navigation from page to page of a thread. If you choose to register and provide your email, that email is solely used to get your password to you and updates on any topics you choose to watch. Nothing else. Ask with any questions!
|
|
|
|
|
|
|
|
|
|
|
