Sky has added the Discovery Channel to its HD line-up, but the company is still being elusive over a launch date.

Titled Discovery HD, the channel will be a 24-hour HD station that follows the same format as the Discovery Channel, albeit in High Definition.

The channel will also deliver a mix of some of Discovery's top series and specials in addition to feature-length “HDShowcase” presentations including Leopard Son, Alien Planet, and Journey to the Centre of the Earth. Discovery HD will offer programming in 1080i (or the 1080i HD format), which lends itself perfectly to the type of rich, spectacular images Discovery is renowned for.

Brian Sullivan, Sky's Director Customer Products and Services said, “Discovery HD will complete our initial channel line up for the launch of Sky HD later this year.”

According to the broadcaster, Sky HD is on track to launch in the UK and Ireland in early 2006. Discovery HD completes the Sky HD initial launch package that also includes: six of Sky's wholly-owned channels: Artsworld HD, Sky Sports HD, Sky One HD, Sky Box Office HD and two Sky Movies HD channels in addition to National Geographic HD.

We will keep you posted.