🌌 Galaxies – The Big Cities of Space

---

🌟 What is a galaxy?

A galaxy is a huge family of:

• Stars ⭐
• Planets 🪐
• Gas and dust ☁️
• All held together by gravity

🧠 Our home is the Milky Way galaxy.

---

🔢 How many galaxies are there?

• In the observable universe, scientists estimate there are
  about 2 trillion galaxies 😲

(Observable universe = the part we can see with telescopes.)

---

⭐ How many stars are there?

• A single galaxy can have billions or trillions of stars
• The Milky Way alone has about 100–400 billion stars

🧠 That’s more stars than grains of sand on many beaches!

---

🪐 How many planets are there?

• Most stars have planets
• Scientists believe there may be more planets than stars
• That means trillions upon trillions of planets in the universe 🌍🌍🌍

---

🌀 Types of galaxies

1️⃣ Spiral galaxies 🌀

• Look like spinning pinwheels
• Have arms that swirl out
• Example: Milky Way

---

2️⃣ Elliptical galaxies 🟡

• Shaped like ovals or balls
• Mostly made of old stars
• Very big or very small

---

3️⃣ Irregular galaxies 🌈

• No clear shape
• Often formed after galaxy collisions

---

🌌 Galaxy sizes

• Some galaxies are small with a few million stars
• Some are giant with trillions of stars
• Galaxies can collide and merge over time

---

🚀 Fun galaxy facts

• Galaxies move and travel through space
• The Milky Way is moving toward the Andromeda galaxy
• Light from far galaxies takes billions of years to reach us

---

🧠 Easy to remember

Galaxies are giant homes for stars and planets

---

⭐ Big wonder thought

• With so many galaxies, stars, and planets…
• Scientists wonder: Is there life elsewhere? 👽

---