• Flew close to Earth in 201 1.
• Was examined by telescopes on Earth and the Spitzer Space Telescope.
• Probably weighs around 100 tons, according to researchers.
• Is so porous that about two-thirds is empty space and one-third is rock.
• The robotic cost of the mission would be about $1.2 billion.
sponsored Jargon is confusing, by definition. And the financial world has its own set of cryptic words.