After facing a barrage of television spots from the U.S. Senate campaign of Gov. Rick Scott, Democratic incumbent Bill Nelson is finally firing back with a new ad (see below) of his own. The Nelson campaign unveiled a digital spot on Tuesday that the campaign says will air on a variety of digital platforms, including Facebook and Twitter. It’s the first ad of the campaign and is called “Stars.”

The spot highlights Nelson’s trip into space aboard the space shuttle Columbia in January 1986 as a payload specialist.

“In Florida, we don’t just reach for the stars, we travel to them. I know. I flew on the Space Shuttle,” says Nelson in the ad. “And when I looked back at our planet, I didn’t see political divisions, I saw how we’re all in this together.”

The Nelson campaign won’t say how much it’s spending on its first ad buy, but digital platforms are typically less expensive than the more conventional television ads. While it’s the Nelson campaign’s first spot, it is not the first ad in support of Nelson. Last week, Democratic Senatorial Campaign Committee made a $2.2 million ad buy in support of the incumbent.

But the Scott campaign has cranked out spot after spot targeting Nelson as a career politician who votes along party lines. In the weeks since launching his campaign on April 9, Scott and his supporters have spent $11 million on television ads that have covered the state in both English and Spanish.

In a story published this weekend by USA Today, brushed off claims that Scott has “out-spent, out-campaigned and out-muscled Nelson in a nationally watched race that could decide who controls the Senate next year.”

And Nelson, 75, downplays polls showing up to a third of Florida voters don’t know enough about him to form an opinion.

“I have not been on the ballot in the last six years and a lot of new people have moved here,” he said, pointing to the transient nature of Florida’s population. “So you ask am I worried. Do I look like I’m worried?”