Red fireballs over Orem, UtahI am in the habit of watching the skies when I walk my dogs at night, and have a keen interest in astronomy, so I feel like I have a pretty good grasp on normal phenomenon.On February 1st, I was walking my dogs as usual, when I noticed a red light in the sky. It was in Orion, so my first thought was that I was seeing either Mars or Betelgeuse, then I realized it was too bright for either one. It then faded away. I noticed several other red lights in the sky following the same path. I watched for a moment, thinking that they might be airplanes, until I saw an actual airplane fly by, between me and the lights. These lights seemed to form a wide arc across the sky, then one by one they faded out.After the arc of lights faded, I noticed several lights that, from my vantage point, seemed to start near the south-south-east horizon (at least under the tree-line), rise up about 10 degrees in a straight line, then fade away. I saw about five follow this pattern, before the cold and my dogs forced me back indoors. I was out for about 15 minutes. I tried to see if I could see the lights from my window, but my view of where they were coming from was blocked by other buildings.I wondered if they were flares, but they traveled in straight lines, not an arc like something shot. They also didn't flare, they stayed the same brightness until they faded away. I also didn't hear any noises that made me think that they might be flares or fireworks.