Also known as axial tilt or obliquity.

也被称为转轴(axial tilt)(obliquity)。

As it happens, a large dip in the jet stream allows very cold air to spill into the U.S. That's the cold air you feel.

碰巧是，高速气流中一个大会让非常冷空气进入美国，这就是你感觉到冷空气。

Together with the tilt, the spinning and revolving causes the number of hours of daylight in a region to change as the year goes by, with more hours in summer and fewer in winter.

地轴、自转与公转共同作用，导致了一年中同一地区白昼时长随着时间推进而不断变化。夏天白昼较长，冬天白昼较短。

So this right here is my ramp.

至於这边这个就先假设它是30度。

Over the course of one orbit we see two such dips, as the first star blocks the second and then half an orbit later when the second passes in front of the first.

在一颗恒运行过程中，我们会看到两次这样，因为第一颗恒遮住了第二颗恒，然后在运行半个轨道之后，第二颗恒会在第一颗恒前面经过。

Making patterns starts from two different colors of wood, and these woods, I take, and I glue them, and I stack them all together, and after they're glued up, I take this block, and I then machine out angled rectangular blocks.

制作拼花首先选用两种色差木料，将木料叠放粘合压实，等待胶层干透，再把粘合好木坯裁切出带矩形料块。

Like Uranus, Pluto rotates on its side, something which results in extreme seasonal changes with part of its surface in constant darkness and part of it in constant daylight for decades.

和天王相似，冥王转轴较大，这造成了季节变化。冥王表面一部分长期处在黑暗中，另有一部分则数十年来受到阳光照射。

Depends on when we have these large dips in the jet streams, placement of the high pressure and low pressure.

取决于喷射流大，高压和低压位置。

You have the date of the impact, the time of the impact, the orbital inclination, and you can make a map.

你有撞击日期，有撞击时间，有轨道，你就可以绘制地图了。

However, perhaps the most catastrophic effect that would happen without a moon would be the extreme change in Earth's axial tilt.

然而，在没有月球情况下，最具灾难性影响可能是地球轴心变化。

Only big moons would cause enough of a dip in brightness to be detectable with today's instruments.

只有大卫才会造成足够光亮，从而被现在仪器探测到。

This is known as the Earth's axial tilt, or obliquity.

这也被称作“轴”。

Earth's tilt could exceed 45 degrees at times in this scenario spinning on its side.

在这种情况下，地球有时可能会超过45度，向一面旋转。

And this angle right over here, let's just go with 30 degrees.

至於这边这个就先假设它是30度。

The Moon holds that tilt steady. The various gravity forces that are exerted tend to act in a way that holds that steady.

月球一直保持着一个。在万有引力作用下始终保持在一个固定。

So it doesn't go straight out of the Earth's atmosphere like this, it actually comes in at an inclination like this.

所以它并不是像这样直接脱离大气层，而是以这样进入大气层。

If the two stars are similar, say both like the Sun, then the two dips look very similar.

如果这两颗恒很相似，比如说都像太阳，那么这两次看起来就非常相似。

Additionally, the eight known major planets of the solar system currently orbit the sun tilted by six degrees compared to the sun's equator.

此外，太阳系中已知 8 颗大行目前围绕太阳运行，与太阳赤道相比，它们为 6 度。

But if one star is much brighter than the other, then the two dips look very different.

但如果其中一颗恒比另一颗亮得多，那么这两次看起来就非常不同。

There's also the angle Earth's axis is tilted, known as obliquity.

地球自转轴斜度，即所谓，也是影响因素之一。