Dramatic footage, which was captured in Tempe and shared online on July 15, showed a strange orb-looking shape in the sky.
It fueled social media users to ask if they were being invaded by extra-terrestrial creatures.
One said: “They not hiding any more (sic).”
Another quipped: “That my friend is a mothership.”
But, National Weather Service meteorologist Marvin Percha told the Arizona Republic that the mothership-like shape was a lenticular cloud.
Lenticular clouds form at high altitudes and near mountain ranges.
When humid air blows over a mountain, waves can form and if temperatures are low, then moisture condenses.
The shape of the cloud looks like a lens.
Meteorologists say that pilots tend to avoid flying near lenticular clouds because they can cause turbulence.
Skeptical TikTokers also pointed out that the strange shape was a cloud.
One said: “That’s a lenticular cloud. They most often form around mountains but can be found pretty much anywhere. They look like UFOs.”
Several alleged UFOs sightings have been reported across the US in recent weeks and months.
Dozens of social media users thought a balloon flying over Laramie, Wyoming was an orb.
On July 15, the Wyoming NASA Space Grant Consortium warned that residents may have seen a balloon flying at around 60,000 feet.
They said it is currently on a 30-day floater mission, which started in Page, Arizona on either July 9 or 10.
The balloon weighs around 1,100lbs and it is equipped with cameras, research, and tracking devices.
A university in Arizona reportedly told officials that a research experiment was on board the flight, but it’s not known what it’s about.
Residents said they had seen the object flying over campsites, parks, and mountain ranges.
Footage captured in June showed a series of bright lights hovering over San Diego.
Some residents said they noticed a glow in the sky near Mission Beach and the city’s Paradise Hills neighborhood.
One Twitter user said they spotted up to five balls of lights flying over the ocean.
They claimed the lights kept glowing for around an hour.
It’s reported that there was no military or commercial planes in the sky at the time, ABC7 reports.
But, a San Diego Police Watch Commander told Fox5 that the lights were generated from military flares, rather than drones or UFOs.
UFOs, or unidentified aerial phenomena, have risen up the political agenda in Washington DC – decades after the issue was restricted to the fringes.
Lawmakers in Congress have recently voted to create a secure database for reporting mysterious encounters.
The House has voted to create the new system in a bipartisan amendment to $850billion worth of plans National Defense Authorization Act (NDAA).
The amendment was proposed by lawmakers Mike Gallagher and Ruben Gallego and it’s designed to encourage people to come forward about supposed encounters.