Close to our size, density, temperature, surface gravity… but that's all we know.

接近我们的大小、密度、温度、表面重力… … 但我们只知道这些。

And that's because a typical neutron star has a surface gravity 100 billion times stronger than Earth's.

这是因为一颗典型的中子星的表面引力是地球引力的1000亿倍。

And how would we deal with such low levels of surface gravity?

我们将如何处理如此低的表面重力？

But that would make the surface gravity 30 times stronger than what it is now.

但这将使表面重力比现在强 30 倍。

The planet orbits very close to its home star. Its surface temperature is about 430 degrees Celsius and its surface gravity may be 70 percent stronger than Earth's.

这颗行星的轨道非常靠近它的主星。它的表面温度约为430摄氏度，其表面引力可能比地球强70%。

All of these things don't solve one fundamental problem though: Mars has only 38 percent of Earth's surface gravity, which could cause muscle-wasting, bone loss, and cardiovascular problems.

火星地表重力只有地球的38％这会导致肌肉萎缩、骨质疏松和心血管问题。

Kepler 22b has a radius 2.4 times that of Earth, and if it is made from roughly the same stuff its surface gravity will also be about 2.4 times as strong.

“开普勒22b”的半径是地球的2.4倍。如果它的构成成分和地球大致相同，这个星球表面的重力也会是地球重力的2.4倍。

My colleague relations predicted that a black hole creates inemic particles and radiation, just as if it were an ordinary, hot body, with the temperature that is proportional to the surface gravity an inversely proportional to the mass.

我的同事预测 黑洞会产生弱粒子和辐射 就好像它是一个普通的高温物体 其温度与表面重力成正比 与质量成反比。

Then in the 70s a theory of black hole  thermodynamics was developed which describes the links between black hole mass and energy, how the  surface area of a black hole relates it s entropy, and how the surface gravity  relates to temperature.

随后在 70 年代，黑洞热力学理论被发展起来，它描述了黑洞质量和能量之间的联系、黑洞表面积与其熵的关系，以及表面引力与温度的关系。