Exhibit 5.1
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Wilson Sonsini Goodrich & Rosati
Professional Corporation
1700 K Street NW
Fifth Floor
Washington D.C., 20006
o: 202.973.8800

December 15, 2022
BlackSky Technology Inc.
13241 Woodland Park Road, Suite 300
Herndon, Virginia, 20171
Re: BlackSky Technology Inc. – “At the Market” Sale and Issuance of up to $75 million of Shares of Common Stock
Ladies and Gentlemen:
This opinion is furnished to you in connection with the Registration Statement on Form S-3 filed by BlackSky Technology Inc. (the “Company”) with the Securities and Exchange Commission (the “Commission”) on October 14, 2022, as amended on December 13, 2022, and declared effective by the Commission on December 15, 2022 (the “Registration Statement”), the prospectus contained within the Registration Statement (the “Prospectus”) and the prospectus supplement to the Registration Statement dated December 15, 2022 (the “Prospectus Supplement”) in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”) of up to $75,000,000 of shares of the Company’s Class A common stock, $0.0001 par value per share (the “Shares”), to be issued and sold from time to time by the Company.
The offering and sale of the Shares are being made pursuant to the Open Market Sale Agreement, dated as of December 15, 2022 (the “Sales Agreement”), by and between the Company and Jefferies LLC (the “Sales Agent”).
We are acting as counsel for the Company in connection with the issuance and sale of the Shares by the Company. In such capacity, we have examined originals or copies, certified or otherwise identified to our satisfaction, of such documents, corporate records, certificates of public officials and other instruments as we have deemed necessary for the purposes of rendering this opinion, including the Sales Agreement, the Registration Statement, the Prospectus and the Prospectus Supplement. In our examination, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the conformity with the originals of all documents submitted to us as copies, the authenticity of the originals of such documents and the legal competence of all signatories to such documents.
We express no opinion as to the laws of any state or jurisdiction other than the General Corporation Law of the State of Delaware (including the statutory provisions and all applicable judicial decisions interpreting those laws) and the federal laws of the United States of America.
On the basis of the foregoing, we are of the opinion that the Shares to be issued and sold by the Company have been duly authorized and, when such Shares are issued and paid for in accordance with the terms of the Sales Agreement, will be validly issued, fully paid and nonassessable.

AUSTIN BEIJING BOSTON BOULDER BRUSSELS HONG KONG LONDON LOS ANGELES NEW YORK PALO ALTO
SALT LAKE CITY SAN DIEGO SAN FRANCISCO SEATTLE SHANGHAI WASHINGTON, DC WILMINGTON, DE



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BlackSky Technology Inc.
December 15, 2022
Page 2

We hereby consent to the filing of this opinion as an exhibit to the Company’s Current Report on Form 8-K filed on or about December 15, 2022, for incorporation by reference into the Registration Statement, and to the use of our name wherever it appears in the Registration Statement, the Prospectus, Prospectus Supplement, and in any amendment or supplement thereto. In giving such consent, we do not believe that we are “experts” within the meaning of such term as used in the Securities Act or the rules and regulations of the Commission issued thereunder with respect to any part of the Registration Statement, including this opinion as an exhibit or otherwise.

Very truly yours,
/s/ Wilson Sonsini Goodrich & Rosati
WILSON SONSINI GOODRICH & ROSATI
Professional Corporation