The iceberg NASA photographed is tabular, which means its basically table-shape: flat on the top and vertical at the edges.
This iceberg probably recently calved from the ice shelf, NASA says.
"Triangular iceberg surrounded by many different types of sea ice, off the Larsen ice shelf in the Weddell Sea", NASA said.
It studies yearly changes in thickness of sea ice, glaciers and ice sheets. They are wide and flat and long, like sheet cake, Brunt said.
Seen from space, this particular iceberg has a rich diversity of sharp-edged friends - and although it initially seemed perfectly rectangular, it's not.
It's hard to tell exactly how big the iceberg is from the photo, but experts said it was probably more than 1.6km (1 mile) across. The berg is estimated to be more than one mile across and, like all icebergs, just 10 percent of its mass is visible above the surface.
Kelly Brunt, a glaciologist at the University of Maryland and Nasa, said tabular icebergs gain their distinctive shape when an angular protrusion breaks off from an ice shelf.
But, he added that "the presence of icebergs like these are a sign of increased calving".
Covering an estimated 5,800 sq km, the Larsen C ice shelf extends along the east coast of the Antarctic Peninsula from Cape Longing to Smith Peninsula.
The odd mass, known as an angular iceberg, was spotted during a flyover of the east coast of the Antarctic Peninsula.
Figuring out exactly how climate change affects Antarctic ice, though, remains challenging, according to Bartholomaus.
"I thought it was pretty interesting", Dr. Harbeck said.