A rather large, usually canvas, bag aka purse, made especially for men.
Cuz hey, guys need something to carry their shit around in too.

The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.

It's not called a man purse it is a satchel. Indiana Jones has one.

A carrying case for men, yet similar to a large purse for women rather than a briefcase. Very VERY metrosexual (and European). It's the metro way to carry a lot of stuff around.

A small item of everyday personal luggage, similar in size to a woman's purse except intended for use by a man, smaller than a briefcase or attache, carried by hand or by a shoulder strap (not belted nor belt-looped), and typically distinguishable from a woman's purse by having a tall, narrow, rectangular form-factor, rather than the short and wide shapes more typical of most women's purses.

A over the shoulder bag worn by men who live in the more urbanized areas. Not all that popular in America because the unfortunate holder of the bag will most certainly be picked on, whispered about or deemed the honourary 'fag of the day' but far more common in the European nations (especially France) where people aren't so silly and suspicious of doing things that will make them seem fruity.

a man's purse. If a man wears a manpurse, it doesn't mean he's gay, but it might mean he's kind of weird.