<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2021-06-30</periodOfReport>

    <dateOfOriginalSubmission>2021-07-02</dateOfOriginalSubmission>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001814329</issuerCik>
        <issuerName>Astra Space, Inc.</issuerName>
        <issuerTradingSymbol>ASTR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001870358</rptOwnerCik>
            <rptOwnerName>Attiq Martin</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ASTRA SPACE, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1900 SKYHAWK STREET</rptOwnerStreet2>
            <rptOwnerCity>ALAMEDA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94501</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Business Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>The transactions previously reported were inadvertently included in Form 3, and in a subsequent amendment filed on July 16, 2021, due to administrative error. These transactions were also reported on Form 4, and in a subsequent amendment filed on July 16, 2021.</remarks>

    <ownerSignature>
        <signatureName>/s/ Martin Attiq</signatureName>
        <signatureDate>2021-09-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
