Aurora
In this undated handout photo the Aurora Australis or 'southern lights' are seen from the Space Shuttle Discovery during the STS-114 mission. Getty Images/NASA

A light show appearing in the skies over northern Norway last week sparked speculation of an alien spacecraft visiting Earth. However, the ghostly shapes that people caught on camera were actually manmade rather than extraterrestrial.

When clusters of purple, yellow and blue lights with an unusual formation created a stunning display in Norway's night sky on April 5, some believed that this may have been proof of an alien spaceship. But the light show was actually created by NASA.

According to a tweet from the space agency's Wallops Flight Facility in Wallops, Virginia, NASA launched a new rocket system from Norway to study the flow of winds in Earth's upper atmosphere.

This wasn't the only light show NASA created as the space agency also made an amazing light show with chemical compounds that were ejected by the Auroral Zone Upwelling Rocket Experiment (AZURE).

According to a statement from NASA, the AZURE is just the first of eight rocket missions set to study the interactions of Earth's magnetic fields and particles from space that bombard the planet. All of them will launch from Norwegian bases in Andøya and Svalbard.

As for what exactly caused the manmade aurora, AZURE expelled chemical tracers, trimethylaluminum (TMA) and a barium-strontium mixture, into the ionosphere, the Earth's electrically-charged atmosphere layer located 46 to 621 miles (75 to 1,000 kilometers) above the surface.

These chemical tracers ionize in sunlight, allowing scientists to follow the flow of neutral and charged particles.

While there is a scientific explanation for the glowing lights over Norway, photographer Michael Theusner was among those who first captured the light show on camera and speculated that it may have been an extraterrestrial visit.

He shared a time-lapse video of the rockets and the resulting light show on Youtube. As he wasn't aware that NASA was launching a new rocket system that day, he jokingly said that he thought it may have been an "alien attack" in his description of the video.

However, Theusner said he found the real explanation behind the lights when he searched them up on the internet.

"We saw two orange dots rise into the sky and disappear," he shared. "A short while later strange lights and colorful, expanding clouds appeared I first did not have an explanation for. It looked like an alien attack ;) A quick internet search showed that we had witnessed aurora research conducted by NASA."