SDTV and high definition television (HDTV) are the two categories of display formats for digital television (DTV) transmissions, which are becoming the standard. In North America, digital SDTV is broadcast in the same 4:3 aspect ratio as NTSC signals with widescreen content being center cut.
Command pilot Neil Armstrong 's flight marked the second time a U.S. civilian flew into space (Joseph Albert Walker became the first U.S. civilian on X-15 Flight 90). Armstrong had resigned his commission in the United States Naval Reserve in 1960.
He was a brave and bold astronaut. This is a timeline of his life. Date Event 1930 Neil Armstrong is born Neil was born on August 5, in Ohio. 1946 Neil flies Neil loved flying things from the time he was young. At sixteen years old he earned his student pilot's license. 1947 Neil goes to college Neil Armstrong joined the US Navy, and he attended Purdue on scholarship.