3 large lights, none flashing, flying less than 2k feet above the ground, and completely silent

I live near 2 major international airports: JFK and LaGuardia airport, I see and hear jet airplanes fly by daily. I have never seen anything like this before.
This aircraft had 3 large steady white lights on the underside of it. 2 of the lights which were perpendicular to direction of travel were closer together than the other light. These 3 large lights instead of being points of light were about the size of a quarter from my perspective which means these lights were very large and this aircraft was very close to the ground. The other light which was furthest away from the other 2 lights were in the direction of travel, which leads me to believe the aircraft is triangular, but because it was night I could not see the shape of the aircraft.
I am used to seeing passenger jets at night they always have 1 red, 1 green, and a flashing white light which I can see from the underside. All of these lights are typically small and at night appear as points of light. This aircraft had none of the usual lights I see on the underside of passenger planes.
Another extremely odd thing is the aircraft was flying extremely low. Other than when I am right next to an airport I have never seen an airplane this low. This is a residential area and the planes have to fly a minimum altitude much higher than this aircraft.
The other extremely odd thing is this aircraft flying at extremely low altitude made absolutely no sound. Planes flying overhead at much higher altitudes than this aircraft was flying would make a huge sound. I have been to military airshows, and also have seen F35 or F22 flying overhead in my neighborhood, they make huge sounds. The time we saw an F35/F22 (I am not sure which one it was) fly overhead at low altitude, I thought every single window in my apartment was going to shatter. With this aircraft sighting tonight, if I did not happen to be looking in the sky when those lights were overhead, I would have never have known that this aircraft was there. It was that quiet, no perceivable sound was being emitted.
The last thing I would say it was flying at incredible speed. If I had my cellphone in hand with my camera ready to take a picture, I doubt it would have be able to catch it. Overhead I had about 40 degrees of field of view which it flew threw my field of vision. It went through those 40 degrees in less than 1 second. Regular passenger aircraft probably would have covered that distance in 2-3 seconds.
I am not expert in aircraft, but I am an enthusiast of military aircraft. I also was an astronomy, physics, engineering major in college, and I live next to 2 of the busiest international airports in the world. I would say this is something which I cannot explain. This was either a top secret stealth military aircraft or alien technology. The 2 things that make me think this is alien technology is the speed and the proximity to the ground this thing was flying. I am not sure if we have the technology to make an aircraft go that fast and yet make no perceivable sound.