The deal will cover 16 of Lennon's solo albums, including Working Class Hero and Walls and Bridges.
Furthermore, because Lennon's solo albums were distributed through EMI, Apple will also include the option to download DRM-free copies of the songs through iTunes Plus.
A big day for Lennon fans, but what about the prospects for Beatles music on iTunes?
Some parts of Atacama have not received rainfall for 500 years - but a sudden deluge of water upset the Desert's delicate biological balance
Spitzer Space Telescope could not spot Oumuamua, suggesting that it is actually pretty small
Greenland crater one of the 25 largest impact craters on Earth
This long-sought progenitor star was identified in an image captured by Hubble in 2007