Silver

Canada BUTTERFLY NEBULA NGC 6302 series SPACE COLLECTION $5 Canadian Maple Leaf Silver Coin 2016 Black Ruthenium & Rose Gold Plated 1 oz

Canada BUTTERFLY NEBULA NGC 6302 series SPACE COLLECTION $5 Canadian Maple Leaf Silver Coin 2016 Black Ruthenium & Rose Gold Plated 1 oz

$289.90

Notes: FREE INTERNATIONAL SHIPPING

Product Code: EM-S-SC-16-02
Availability: Order now, we'll request for you

Name of series
SPACE COLLECTION	> CLICK TO VIEW THE SERIES
ALL BLACK RUTHENIUM	> CLICK TO VIEW THE SERIES
Space	> CLICK TO VIEW
Canadian Silver Maple	> CLICK TO VIEW THE SERIES
Specifications
Metal	Silver
Mintage	500
Fineness (% purity)	99.99%
Content (Troy OZ)	1
Denomination (CAD)	$5
Weight (g)	31.10
Diameter (mm)	38.00
Year of Issue	2016
Country	Canada
Quality	Uncirculated
Decoration	Three precious metals: Silver coin with BLACK RUTHENIUM and 24K ROSE GOLD PLATED
Package	New style box + color package (see picture)
Certificate of Authenticity	with a serial number (see picture)

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✔ Innovation - three precious metals in one coin (Silver, Ruthenium and Rose Gold)
✔ Unique design - coin with full Ruthenium and partial Rose Gold finishing
✔ Delivery in New style box + color package (see picture)
✔ Individual numbered certificate included
✔ Its uniqueness is guaranteed by the limited mintage of 500 coins

The whole product is held in a combination of black and rose gold. The coin is finished with 2 different precious metals on top of pure 1oz silver base. The whole coin is fully finished by Black Ruthenium. After this application the motif is finished in a complicated process with .999 rose gold. The challenge was to create a high detailed rose gold finishing on the black ruthenium. The coin will be delivered in a wooden box with a cover print. In addition each certificate has an individual serial number.

NGC 6302, also called the Bug Nebula, Butterfly Nebula, is a bipolar planetary nebula in the constellation Scorpius. The structure in the nebula is among the most complex ever observed in planetary nebulae. The spectrum of NGC 6302 shows that its central star is one of the hottest stars in the galaxy, with a surface temperature in excess of 200,000 K, implying that the star from which it formed must have been very large (cf. PG 1159 star).

The central star, a white dwarf, was only recently discovered (Szyszka et al. 2009), using the upgraded Wide Field Camera 3 on board the Hubble Space Telescope. The star has a current mass of around 0.64 solar masses. It is surrounded by a particularly dense equatorial disc composed of gas and dust. This dense disc is postulated to have caused the star's outflows to form a bipolar structure (Gurzadyan 1997) similar to an hour-glass. This bipolar structure shows many interesting features seen in planetary nebulae such as ionization walls, knots and sharp edges to the lobes.

As it is included in the New General Catalogue, this object has been known since at least 1888. The earliest known study of NGC 6302 is by Edward Emerson Barnard, who drew and described it in 1907 (Meaburn et al. 2005).

Since then it has been the focus of many works and displays many interesting characteristics worthy of study. Interest in recent years has shifted from discussions over the excitation method in the nebula (shock-excitation or photo-ionisation) to the properties of the large dust component.

It featured in some of the first images released after the final servicing mission of the Hubble Space Telescope in September 2009.

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Canada BUTTERFLY NEBULA NGC 6302 series SPACE COLLECTION $5 Canadian Maple Leaf Silver Coin 2016 Black Ruthenium & Rose Gold Plated 1 oz

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