Here are a few options for a WordPress post tag description for “行星” (Xíngxīng, meaning “planet” in Traditional Chinese), depending on the specific needs and context:

**Option 1: Simple and Concise (Good for general use)**

* **Description:** 指的是宇宙中围绕恒星运行的天体，包括我们所居住的地球。 (Refers to celestial bodies in the universe that orbit a star, including our home, Earth.)

**Option 2: More Detailed (Suitable if your posts delve deeply into astronomy)**

* **Description:** 行星在天文学中，是指自身不发光，环绕恒星运行的大型天体。 这些天体通常具有足够的引力来保持球形，并已清扫其轨道上的其他小天体。 了解太阳系，系外行星，和行星的形成与特性。 (In astronomy, planets are defined as large celestial bodies that do not emit light themselves and orbit a star. These celestial bodies usually have enough gravity to maintain a spherical shape and have cleared other small celestial bodies in their orbit. Learn about the solar system, exoplanets, and the formation and characteristics of planets.)

**Option 3: Focus on your Specific Blog Content (Adapt to your specific topics)**

* **(Example if your blog focuses on science fiction):** 探索关于外星世界，星际旅行，以及科幻小说中的行星。 (Explore alien worlds, interstellar travel, and planets in science fiction.)
* **(Example if your blog is about educational content):** 了解有关行星的科学真相，观察技巧，以及它们在宇宙中的位置。 (Learn the scientific truths about planets, observation techniques, and their place in the universe.)

**Option 4: Using keyword-rich description (For SEO benefit, but don’t overdo it)**

* **Description:** 包含关于行星，太阳，地球，外星系，宇宙，天文学的帖子。 (Contains posts about planets, the sun, Earth, exoplanets, the universe, and astronomy.)

**How to choose the best description:**

* **Consider your audience:** Who are you trying to reach? A more technical description might be suitable for a science blog, while a simpler one is better for a general audience.
* **Think about your content:** Does your blog primarily focus on scientific accuracy, creative writing, or something else? Adapt the description accordingly.
* **Keywords:** Use relevant keywords to help improve SEO, but don’t sacrifice clarity.
* **Conciseness:** Keep it brief and to the point.

**To add the description in WordPress:**

1. **Go to the “Posts” section in your WordPress dashboard.**
2. **Go to “Tags”.**
3. **Find the tag “行星”.**
4. **Edit the tag.** You should see a field labeled “Description”.
5. **Paste your chosen description into the “Description” field.**
6. **Click “Update”.**

Remember to choose the description that best reflects your content and your audience! Good luck.