What does Peter mean by invoking Psalm 110 in his sermon in Acts 2?

For David did not ascend into the heavens, but he himself says,
     “‘The Lord said to my Lord,
     “Sit at my right hand,
     until I make your enemies your footstool.”’ ([Acts 2:34, ESV][esv])

Who are the two “Lords,” and how does this work in Peter’s argument?

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_{Please note, there is another Q&A focusing on the Psalm in the context in which it was written: [What does “The Lord said to my Lord” mean in Psalm 110?][lc]} [lc]: http://hermeneutics.stackexchange.com/q/11579/3555 [esv]: http://www.esvbible.org/Acts%202/

What does Peter mean by invoking Psalm 110 in his sermon in Acts 2?

For David did not ascend into the heavens, but he himself says,
     “‘The Lord said to my Lord,
     “Sit at my right hand,
     until I make your enemies your footstool.”’ ([Acts 2:34, ESV][esv])

Who are the two “Lords,” and how does this work in Peter’s argument?

---

_{Please note, there is another Q&A focusing on the Psalm in the context in which it was written: [What does “The Lord said to my Lord” mean in Psalm 110?][lc]} [lc]: https://hermeneutics.stackexchange.com/q/11579/3555 [esv]: http://www.esvbible.org/Acts%202/

What does it mean when david said " The Lord said to my Lord'? There are clearly two Lord's being mentioned here.

What does Peter mean by invoking Psalm 110 in his sermon in Acts 2?

For David did not ascend into the heavens, but he himself says,
     “‘The Lord said to my Lord,
     “Sit at my right hand,
     until I make your enemies your footstool.”’ ([Acts 2:34, ESV][esv])

Who are the two “Lords,” and how does this work in Peter’s argument?

---

_{Please note, there is another Q&A focusing on the Psalm in the context in which it was written: [What does “The Lord said to my Lord” mean in Psalm 110?][lc]} [lc]: http://hermeneutics.stackexchange.com/q/11579/3555 [esv]: http://www.esvbible.org/Acts%202/