POS Polar Star Mining (Tier2)

Polar Star Mining Corporation (TSX VENTURE:POS)(PINK SHEETS:POSRF) ("Polar Star"
or the "Company") announces that it has acquired an additional 5% equity
interest in the Chepica Mine by paying 150 million Chilean Pesos (approximately
US$293,000). In addition, Polar Star has amended the Chepica Acquisition
Agreement to enable the acquisition of the remaining 15% equity interest for 600
million Chilean Pesos (approximately US$1.2 million) on or before June 20, 2009.
Pending successful completion of its final due diligence review, Polar's
acquisition cost for the remaining 90% equity interest is 2.85 billion Chilean
Pesos (approximately US$5.6 million), due on or before June 20, 2009. The
acquisition of 100 per cent of the mine will therefore total 3.15 billion
Chilean Pesos (approximately US$6.2 million). A feasibility study has not been
completed and there is no certainty the proposed operations will be economically
viable.


The Chepica Mine

This Chepica Mine acquisition adjoins Polar Star's wholly owned Corinto and
Batuco claims. These claims plus the Chepica Mine property total 16,640 hectares
in the Pencahue District, Region VII, Chile on which prior exploration by other
companies has defined 15 high grade gold and copper-gold zones. The Chepica Mine
is scheduled to go into production during the third quarter of this year at a
planned initial production of 200 tonnes per day increasing to over 500 tonnes
per day by mid 2009. The Mine will produce a copper-gold concentrate.


The Chepica Mine property, located 225 kilometers south of Santiago, near the
city of Talca, covers the Cerro Chepica high grade copper-gold mining district.
It is readily accessible by paved and good gravel road from the city of Talca 20
kilometers to the east. See Polar Star's news release of April 24, 2008 for
additional information.


Qualified Person

Mr. Terence Walker, M.Sc., P.Geo., is the qualified person within the meaning of
National Instrument 43-101. Mr. Walker has reviewed the contents of this news
release.


About Polar Star

Polar Star was created to acquire advanced stage exploration properties focusing
on gold, copper gold, and uranium. The Corporation's material assets include 20
projects in Chile, which are 100% owned and cover approximately 141,000
hectares. Polar Star announced the closing of a $5 million private placement on
July 8, 2008 during which HudBay Minerals Inc. acquired 3,860,605 Units
(approximately 9.9% of the outstanding shares of the Company, as at July 8,
2008).


Forward-Looking Statements

The statements made in this news release may contain forward-looking statements
that may involve a number of risks and uncertainties. Actual events or results
could differ materially from the Company's expectations and projections.
Accordingly, readers should not place undue reliance on forward-looking
statements. For a more detailed discussion of such risks and other factors,
refer to Polar Star Mining Corporation's filings with Canadian securities
regulators available on www.sedar.com  or the Company's website at
www.polarstarmining.com.


Share Capitalization:

Shares Outstanding: 39,164,098 as at August 11, 2008.

Business Television Feature:

Polar Star was selected and featured on Business Television in early March 2008.
If you missed the show, please click on the link below to watch the full-feature

http://www.b-tv.com/i/videos/PolarStar.wmv

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