Here's all we know (so far) about America's newest stealth bomber

An artist rendering shows the first image of a new Northrop Grumman Corp long-range bomber B21 in this image released on February 26, 2016. REUTERS/U.S. Air Force/Handout/Files via Reuters

(Artist rendering shows the first image of a new Northrop Grumman Corp long-range bomber.Thomson Reuters)

WASHINGTON, D.C. — Little is known about America's newest stealth bomber, the B-21, which will replace the Air Force's aging B-52 and B-1Bs.

Shrouded in secrecy, here's all we know (so far) about the B-21:

• It will be developed by Northrop Grumman, the same manufacturer of the iconic B-2 Spirit

• Northrop Grumman won the contract in October

• The Air Force is slated to buy 100 of these new bombers

• The program is estimated to cost $80 billion

• The Air Force estimates it will pay $511 million per aircraft (in 2010 dollars)

• The new bomber is not expected to enter combat before 2025

• The "21" in B-21 means it's the bomber of the 21st century

• There are no existing prototypes of the bomber aircraft; however, based on the artist rendering, the B-21 shares some resemblance to the B-2 Spirit

• The final design of the B-21 remains unknown

• US Air Force Secretary Deborah James hosted a naming contest for the 21st century bomber and received more than 4,600 entries

• James and Air Force Chief of Staff David Goldfein chose the name and it was revealed during the annual Air Force Association's (AFA) conference

• The name chosen for the bomber is Raider after famed World War II air commander Gen. James Doolittle's group

• During the AFA conference, the Air Force recognized that the KC-46A Pegasus tanker, F-35A Lightning II jet, and the B-21 Raider bomber as top priorities to receive funding

NOW WATCH: America's B-2 stealth bomber is unlike any military aircraft in the world

More From Business Insider

• This is what the future of air warfare looks like
  

• Retired B-1 bomber pilot: A US presence in Asia is 'absolutely required'
  

• Watch 12 B-52s take off in an exercise to demonstrate the US's 'nuclear prowess'