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Comets, Shooting Stars And Asteroids

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Bedrock Of The Community
United States
17527 Posts
Posted 11/15/2015   06:40 am  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Czechoslovakia
Vega Program and Halley's Comet
April 12, 1985
The Vega program was a series of Venus missions that also took advantage of the appearance of Comet Halley in 1986. Vega 1 and Vega 2 were unmanned spacecraft launched in a cooperative effort among the European countries in December 1984. They had a two-part mission to investigate Venus and also flyby Halley's Comet.


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Bedrock Of The Community
United States
17527 Posts
Posted 11/15/2015   06:50 am  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Romania
Halley's Comet minisheet
January 27, 1986


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Bedrock Of The Community
United States
17527 Posts
Posted 11/19/2015   8:55 pm  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Ukraine
Space Exploration - The International Watch of Halley's Comet
April 12, 2006


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Bedrock Of The Community
United States
17527 Posts
Posted 12/13/2015   2:20 pm  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Botswana
Sky at Night - Meteorite
November 18, 2009


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Bedrock Of The Community
United States
17527 Posts
Posted 06/09/2016   08:58 am  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Cyprus
EUROPA - European Aerospace
May 6, 1991
Set of two, one stamp depicts the European spacecraft Giotto and its close observation of the Halley's Comet.


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Bedrock Of The Community
United States
17527 Posts
Posted 07/04/2016   1:34 pm  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Paraguay
Halley's Comet
April 30, 1986 (stamps)
July 28, 1986 (souvenir sheet)
5 Gs: Bayeux Tapestry portraying Halley's Comet
10 Gs: Edmond Halley (1656-1742) and Halley's Comet
30 Gs: Ariane rocket andspace probe GIOTTO
25 Gs: Trajectory of Halley's Comet and the orbit of the Earth




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Bedrock Of The Community
United States
17527 Posts
Posted 07/04/2016   1:55 pm  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Belize
Halley's Comet
April 30, 1986
The souvenir sheet shows Halley's comet and its computer processed image.

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Bedrock Of The Community
United States
17527 Posts
Posted 08/18/2016   2:56 pm  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Turkish Cyprus
Events of the Year
October 13, 1986
One of the four stamps depicts the Giotto spacecraft and its encounter with the Halley's Comet on March 13, 1986.


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Bedrock Of The Community
United States
17527 Posts
Posted 09/27/2016   10:56 pm  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Panama
Passing of the Halley Comet
October 30, 1986
The souvenir sheet depicts Halley comet flying over the Old Panama Cathedral tower.


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Bedrock Of The Community
United States
17527 Posts
Posted 09/27/2016   11:34 pm  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Sri Lanka
Halley's Comet
April 5, 1986
The souvenir sheet contains four stamps (Comet as Goddess visiting Sun God, Comet passing between Scorpious and Sagittarius, The Orbit of Halley´s Comet, Edmond Halley) with the Halley's Comet in the background.

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Valued Member
United States
24 Posts
Posted 12/23/2016   11:27 am  Show Profile Bookmark this reply Add fimych to your friends list  Get a Link to this Reply
this is my first post, so don't be upset too much

Tunguska event - the largest impact event on Earth in recorded history. Studies have yielded different estimates of the superbolide's size, on the order of 60 to 190 metres (200 to 620 feet), depending on whether the body was a comet or a denser asteroid. Modern calculations that include the effect of the object's momentum estimate that the airburst had an energy range from 3 to 5 megatons of TNT.
A large explosion that occurred near the Stony Tunguska River, in Yeniseysk Governorate (now Krasnoyarsk Krai), Russia, on the morning of 30 June 1908. The explosion over the sparsely populated Eastern Siberian Taiga flattened 2,000 km2 (770 sq mi) of forest (it caused no known human casualties). The explosion is generally attributed to the mid-air disruption of a superbolide. It is classified as an impact event, even though no impact crater has been found; the object is thought to have disintegrated at an altitude of 5 to 10 kilometres (3 to 6 miles) rather than hit the surface of the Earth.
The first recorded expedition was conducted in 1927 by Leonid Kulik team following another three and an aerial survey. A stamp was issued in 1958 to commemorate the 50th anniversary of the event and Kulik efforts to explore it.



Sikhote-Alin event - an iron meteorite that disintegrated in Earth atmosphere and fell as a rain of debris on Feb 12, 1947 in Sikhote-Alin mountains (Far East Russia close to the Russian-Chinese border) near the remote village of Beitsukhe. The overall size of the debris was estimated at 70 tons with the largest weighting 1745 kilograms. After the conflict with China in 1969 Beitsukhe was renamed to Meteoritny.
A lot of people witnessed the event and between them was an artist Petr Medvedev who was in the middle of sketching the local landscape. His painting appeared on the stamp and cover commemorating 10th anniversary of the event in 1957. The stamp was already shown here, but I include it to complete the picture.





Chelyabinsk meteorite event was the biggest since Tunguska in 1908. On the morning of Feb 15, 2013 a small asteroid (around 17 meters in diameter) entered Earth atmosphere, disintegrated and exploded at around 20km above Chelyabinsk area in Russia. The explosion yield was calculated as equivalent to 200 kiloton of TNT (although some sources estimate it as 500kT). Huge amount of small debris fell over the Etkulsk district while the biggest piece (over 500 kilograms) got into the Chebarkul Lake and was extracted half a year later.

A special postmark was used to celebrate 3rd anniversary of the event. One enthusiastic postcard designer and astrophilatelist from Chelyabinsk created a series of cards to commemorate the event and that is what I have along with some other private designs.






the last is the Romanian cover, this is not really my specialty but just another meteorite event



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Bedrock Of The Community
United States
17527 Posts
Posted 02/20/2017   12:13 pm  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Lesotho
Return of Halley's Comet
April 5, 1986
Halley is the only known short-period, naked-eye comet that might appear twice in a human lifetime. It last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061.


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Bedrock Of The Community
United States
17527 Posts
Posted 09/23/2017   7:21 pm  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Romania
The History of Astronomy
April 22, 2016
The minisheet commemorates 950 years since the passing of Halley's Comet observed in 1066.


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Bedrock Of The Community
United States
17527 Posts
Posted 08/01/2021   12:16 am  Show Profile Bookmark this reply Add KuoLC5310 to your friends list  Get a Link to this Reply
Japan
Astronomical Worlds I
February 7, 2018
Set of ten, one stamp depicts Hale-Bopp Comet discovered in 1995. Its last perihelion was on April 1, 1997.
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