The biggest supermoon of the year will light up the sky on Tuesday.

February’s full moon reached its peak at 10:54 a.m. Eastern time on Tuesday, when the moon was still below the horizon for viewers in the U.S., according to Space.com.

But American space fans will still get a great show ― and plenty of photo opportunities ― with this month’s supermoon. The key is to watch the horizon during moonrise.

“The Moon will look extremely large when it rises and sets,” NASA astronomer Mitzi Adams wrote in a blog for NASA on Friday. “This ‘Moon illusion’ happens when the Moon is close to the horizon and there are objects within our line of sight such as trees or buildings.”

“Because these relatively close objects are in front of the Moon, our brain is tricked into thinking the Moon is much closer to the objects that are in our line of sight,” she continued.