Read about planets, stars, galaxies and the people and tools used to explore space. Choose an article below; its reading controls let you move between the available levels.
1,134 public articles · Page 13 of 24
A big cloud of ice may hide far away. It is full of many icy rocks. These rocks can become bright comets. They help keep the outer cloud full. It is a very big place. Do you like looking at the stars?
Early Reader · Change the reading level on the articleA special tool went into space. It looked at the stars. It found where they are. It found how far away they sit. This helps us learn about space. Do you like looking at stars?
Early Reader · Change the reading level on the articleBig clouds float in space. They are made of gas. These clouds are very far away. They help us see how stars move. We use special tools to find them. Space is so big and cool! Can you look at the stars?
Early Reader · Change the reading level on the articleA bright ring sits in space. It looks like a big circle. The ring has blue stars. The middle is yellow. It is very far away. It is a pretty sight. Do you like stars?
Early Reader · Change the reading level on the articleSpacecraft use a special path to move. They move from one circle to a bigger one. First, they fire an engine to move out. Then, they fire it again to stay. This helps them save fuel. Can you imagine flying in space?
Early Reader · Change the reading level on the articleThe sky looks the same everywhere. It is very warm in all spots. This is a big mystery. Parts of space are too far apart to touch. How did they get so even? Can you think of a way?
Early Reader · Change the reading level on the articleSome stars change as they get old. They grow big and red. Then they change again. They get hot and bright. This makes them look like a line. Do you like looking at stars?
Early Reader · Change the reading level on the articleSome stars look like a clock. They are in the sky. You can see them at night. They help us learn about space. It is a big part of the sky. Do you like to look at stars?
Early Reader · Change the reading level on the articleSome rocks move like a big shoe. They go around the sun near Earth. They catch up to us. Then they fall behind. They never hit our planet. It is a funny path. Can you see the shape?
Early Reader · Change the reading level on the articleSome giant planets are very hot. They live near a bright star. This makes them warm. They are big and round. They move fast in space. Do you think they are hot?
Early Reader · Change the reading level on the articleStars and the sun move in the sky. We can use math to find them. This helps us know where they are. It helps us find our way. It is like a clock in the sky. Do you like to look at stars?
Early Reader · Change the reading level on the articleA big telescope took a photo. It looked at a tiny spot. We saw many far away groups of stars. They look like bright dots. This helps us learn about space. Do you like looking at the stars?
Early Reader · Change the reading level on the articleStars live in big groups. These are called galaxies. Some look like round balls. Some look like spinning wheels. Some look messy and odd. We use shapes to name them. Do you like looking at the stars?
Early Reader · Change the reading level on the articleA big camera took a photo. It shows many far away stars. We see ten thousand tiny groups. These groups are called galaxies. They are very old. They help us learn about space. Do you like to look at the stars?
Early Reader · Change the reading level on the articleSpace is growing every day. It grows very fast. Some parts move away from us. They move faster than light. This makes a big shape around us. It is a part of space. Can you imagine a giant space shape?
Early Reader · Change the reading level on the articleSome stars form a giant group. It is very, very big. It is far away in space. It helps us learn about the sky. We can look up and wonder. Can you see the stars?
Early Reader · Change the reading level on the articleHydra is a big shape in the sky. It looks like a long snake. The snake is made of many stars. It is the biggest shape of all. Can you find it at night? Look up at the stars!
Early Reader · Change the reading level on the articleSpace has tiny bits of gas. These bits make a special sound. We can hear it with big tools. It helps us see our galaxy. It helps us look for friends in space. Can you look at the stars?
Early Reader · Change the reading level on the articleHydrus is a group of stars. It looks like a water snake. It is in the deep south sky. You can see it from some places. It is very pretty. Can you find it in the sky?
Early Reader · Change the reading level on the articleA star can have a huge blast. This blast is very bright. It is much bigger than other star blasts. It sends out lots of light. It is a big, bright show in space. Can you imagine a star that big? It is very cool to see.
Early Reader · Change the reading level on the articleIapetus is a big moon. It goes around Saturn. One side is dark. The other side is bright. It is made of ice. It looks like a walnut. Do you like moons?
Early Reader · Change the reading level on the articleA planet is a big thing in space. It goes around the sun. It is shaped like a ball. It must also clear its path. This helps us know what is a planet. Do you like looking at the stars?
Early Reader · Change the reading level on the articleIbn Yunus was a man who loved stars. He lived in Egypt a long time ago. He used tools to watch the sky. He wrote down what he saw. He was very good at math. We even named a spot on the moon after him! Can you look at…
Early Reader · Change the reading level on the articleThis is a giant group of stars. It is very big. It has a huge center. A big black hole is there too. It looks golden yellow. Can you find it in the sky?
Early Reader · Change the reading level on the articleThere are many groups of stars. Some groups are very far away. One group is near our own. Dust in our sky hides them. It is hard to see them. Can you look at the stars?
Early Reader · Change the reading level on the articleScientists use ice to see space. They put sensors deep in the ice. These sensors look for tiny things. These things come from far away. It helps us learn about the stars. Can you imagine a telescope made of ice?
Early Reader · Change the reading level on the articleSome planets are very big. They are called ice giants. Uranus and Neptune are these planets. They are not made of hard rock. They have lots of gas and liquid. Do you like looking at the stars?
Early Reader · Change the reading level on the articleIndus is a group of stars. It looks like a triangle in the sky. You can see it from many places. It is far away in the night sky. It is fun to look for. Can you find it?
Early Reader · Change the reading level on the articleSome light is invisible to us. Special tools see this light. They look at far stars. This helps us see new things. It is like having magic eyes. Can you imagine seeing hidden light?
Early Reader · Change the reading level on the articleThis tool looks at space. It sees heat from far away. It can find stars and old dust. This helps us learn about the sky. It is very cool! Do you like to look at stars?
Early Reader · Change the reading level on the articleStars are born in groups. Some stars are big. Some stars are small. We can guess how many there are. This helps us learn about space. Do you like looking at stars?
Early Reader · Change the reading level on the articleSome stars do not stay still. They grow and shrink. They change how bright they look. This happens in a special part of space. It is like a star breathing. Can you look at the stars tonight?
Early Reader · Change the reading level on the articleBig groups of stars can meet. They pull on each other. This can change their shape. Sometimes they even join to become one. It is a big dance in space. Can you imagine that?
Early Reader · Change the reading level on the articleTiny dust floats in space. It sits between big groups of stars. This dust can hide far away things. It can make clouds in the dark. We look for it to learn. It is very far away. Can you see the stars?
Early Reader · Change the reading level on the articleSome stars live all alone. They do not stay in a group. They might fly out when big groups of stars crash. This can happen very fast. It is a big surprise! Do you like looking at the stars?
Early Reader · Change the reading level on the articleSome black holes are middle sized. They are not too big. They are not too small. They live in space. They help us learn about stars. Can you look at the stars?
Early Reader · Change the reading level on the articleThe Moon has many layers. It has a hard skin. Under that is a thick middle. A small metal part is in the center. It is very old. Can you look up at it tonight?
Early Reader · Change the reading level on the articlePeople study the stars. They work together in a big group. This group gives names to planets. They help us learn about space. It is a big job. Do you like the stars?
Early Reader · Change the reading level on the articleTiny bits of dust float in space. They live between the planets. This dust can catch sunlight. It makes a soft glow in the dark sky. You can see it on a dark night. It is very pretty. Can you look for it?
Early Reader · Change the reading level on the articleBig clouds float in space. They are made of gas and dust. These clouds come from old stars. They help us learn about space. It is a very big place. Do you like to look at the stars?
Early Reader · Change the reading level on the articleTiny ice grains float in space. They are in cold clouds. This ice helps make stars. It even helps make our world. Much of our water was here long ago. It is very cold out there. Can you imagine space ice?
Early Reader · Change the reading level on the articleSome rocks come from far away. They do not stay near our Sun. They fly through space from other stars. These visitors are very special. We can see them passing by. Do you want to look up at the stars?
Early Reader · Change the reading level on the articleStars are very far away. Space is very big. It takes a long time to fly there. We do not have fast ships yet. We want to see new worlds. Can you imagine flying to a star?
Early Reader · Change the reading level on the articleHot gas lives in space. It sits between far away stars. This gas is very hot. It glows with bright light. This light helps us see space. It is a big wonder. Can you see the glow?
Early Reader · Change the reading level on the articleA special tool went into space. It looked at the whole night sky. It found many stars and comets. This helped us learn about space. It was a great helper. Do you like looking at stars?
Early Reader · Change the reading level on the articleSome planets are made of metal. They are very heavy and small. They do not have much rock. This is not like our home. Space is full of surprises! Can you imagine a metal world?
Early Reader · Change the reading level on the articleIndia has a space group. They send things to space. They sent ships to the Moon. They even sent one to Mars. This helps us learn about the stars. It is very cool! Do you like space?
Early Reader · Change the reading level on the articleJack Swigert was a pilot. He flew a ship to the Moon. He helped his team stay safe. He was very brave. We can learn from his work. Do you like planes?
Early Reader · Change the reading level on the article