@@ -134,14 +134,14 @@ Urbit's deterministic design.
134134
135135### What is Urbit ID? {#what-is-urbit-id}
136136
137−Urbit ID is a general-purpose decentralized PKI ("public key infrastructure")
138−that Urbit uses as an identity system. This system is implemented as a suite of
139−smart contracts on the Ethereum blockchain, and it determines which Ethereum
140−addresses own which Urbit [planets](@/docs/glossary/planet.md),
141−[stars](@/docs/glossary/star.md), or [galaxies](@/docs/glossary/galaxy.md). In
142−[Urbit OS](#what-is-arvo), a single identity is called a
143−"[ship](@/docs/glossary/ship.md)", whereas in Urbit ID a single identity is just
144−an "identity."
137+Urbit ID is the identity system utilized by Urbit, which associates to each
138+[ship](@/docs/glossary/ship.md) a public and private key used to establish
139+encrypted connections between one another and to guard private data. For
140+[planets](@/docs/glossary/planet.md), [stars](@/docs/glossary/star.md), and
141+[galaxies](@/docs/glossary/galaxy.md), this is achieved with a set of Ethereum
142+smart contracts called [Azimuth](#what-is-azimuth). Keys for
143+[moons](@/docs/glossary/moon.md) and [comets](@/docs/glossary/comet.md) are
144+handled within Urbit.
145145
146146### What are stars, galaxies, and planets? {#stars-galaxies-planets}
147147
@@ -151,7 +151,13 @@ Planets are intended for everyday use by individuals, and there are 4.3 billion
151151
152152### What is Azimuth? {#what-is-azimuth}
153153
154−[Azimuth](@/docs/glossary/azimuth.md) is what we call the set of Ethereum contracts that make up Urbit ID. It's also kind of a [cool astronomical concept](https://en.wikipedia.org/wiki/Azimuth).
154+[Azimuth](@/docs/glossary/azimuth.md) is what we call the set of Ethereum
155+contracts that make up a general-purpose decentralized PKI ("public key
156+infrastructure") utilized by Urbit ID. It keeps a record of which Ethereum
157+addresses own which Urbit planets, stars, and galaxies, as well as the public
158+keys associated with those ships.
159+
160+It's also kind of a [cool astronomical concept](https://en.wikipedia.org/wiki/Azimuth).
155161
156162### How many planets, stars, and galaxies are active? {#how-many-planets-stars-galaxies}
157163