That's because scientists don't know for sure if they've identified an extragalactic exoplanet.

这是因为科学家们不确定他们是否发现了一颗银系的行星。

They are thought to travel to Earth from other galaxies and extragalactic sources.

他们被认为是从其他星系和星系的来源来到地球的。

The researchers say more data will be needed to confirm the observation as an actual " extragalactic exoplanet" .

研究人员说，还需要更多的数据来证实这是一颗真正的" 星系系行星" 。

The future of extragalactic astronomy appears promising in the James Webb era.

在詹姆斯·韦伯时代，银文学的未来得充满希望。

Maybe for now, let's exclude the background imaging of cosmic extragalactic polarization instruments.

时，我们不谈及宇宙银系极化背景成像仪器。

Additionally, there are extragalactic cosmic rays  that may come from even more distant and powerful sources in the universe, such  as quasars and active galactic nuclei.

此， 还存在来自宇宙中更为遥远且能量更强的体，如类星体和活动星系核等， 这些可能就是宇宙射线的源头。

Understanding the evolution of stars is critical for studying galactic and extragalactic astronomy, and these studies on supernovas will undoubtedly lead to exciting results.

理解恒星的演化对于研究银系和文学至关重要，而这些关于超新星的研究无疑将带来令人兴奋的结果。

In galactic and extragalactic astronomy, the star formation rate is significant number.

在银系及文学中，恒星形成率是一个重要数值。

The analysis is based on some of the first NIRCam datasets observed and released over extragalactic fields.

分析基于一些最早发布的近红相机数据集，这些数据集观测了领域。

We have published a detailed video on Webb's  top discoveries so far, from the solar system to stellar astrophysics and from exoplanets to  extragalactic astronomy.

我们发布了一段详细介绍韦伯迄今为止重大发现的视频，内容涵盖了从太阳系到恒星体物理学， 再到系行星和超银系文学的各个方面。

Another clue that made the case of an extragalactic origin stronger was that these bright, point-like bursts were not concentrated on the Milky Way's plane.

另一个让银起源案例更有力的线索是，这些明亮的点状爆发并没有集中在银平面。

Its properties challenge our understanding of  extragalactic astronomy.

其特性挑战了我们对星系文学的理解。

The missing satellite problem, also known as  the dwarf galaxy problem, is one of the most important puzzles in extragalactic astronomy.

失踪卫星问题，又称矮星系问题，是银系文学中最重要的谜题之一。

This technique is the gold standard in determining extragalactic distances.

这项技术是确定距离的金标准。

Finally, all far-ultraviolet to far-infrared extragalactic  photons, including light from stars, active-galactic nuclei, and other objects,   represents the extragalactic background light.

最终，所有来自远紫线到远红线的光子，包括恒星、活动星系核和其他体发出的光线，构成了背景光。

So the first question that needed an answer was that were these signals coming from within the Milky Way or did they have an extragalactic origin?

所以第一个需要解答的问题是这些信号是来自银系内部还是具有星起源？

So the spectroscopic redshift is the gold standard for determining extragalactic distances.

因此，光谱红移是确定距离的金标准。