Yesterday, humans successfully landed a probe on a comet for the first time ever.
Dr Matt Taylor, the project scientist on the mission, wore this shirt during interviews in the lead-up to the landing.
Some people thought it was amusing.
But plenty of people were unimpressed.
A day after the landing, people are still talking about it.
And now a journalist who tweeted her disapproval has been told to "jump off a cliff".
A scientist helpfully tweeted how the objectification of women affects a workplace.
The paper that tweet links to, published in the journal Psychology, Public Policy, and Law in 2013, says sexual objectification results in "worse performance, more sexual harassment, and more negative emotion".
At least next time we land on a comet, Taylor now knows what shirt to wear instead.
Taylor has since apologised for wearing the shirt. He said: "I made a big mistake and I offended many people and I am very sorry about this."