Low Mass

Or, to put it in the language of physics, they must have low mass.

It is mostly air, which has a much lower mass than water.

The trend towards higher reliability and lower mass for a given power will probably continue.

In other words: sensors with low mass or small thickness.

The planet has a lower mass, but its overall size is larger than Jupiter.

Two other planets may be present, one of which would have the lowest mass ever found.

Despite having a slightly lower mass, this star is more luminous than the Sun.

Having a low mass isn't good enough: It has to be a star.

These animals also have the advantage of being far lower mass than the typical human.

They have a different structure and lower mass than our galaxy.