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 4 of 24
A nova looks like a new star. It is a bright flash in space. Two stars live very close together. One star feeds the other. This makes a big, bright light. It can be seen from Earth. Have you seen a bright star?
Early Reader · Change the reading level on the articleWe live in a big space. It is full of stars. We can see many far things. Light travels to our eyes. This light helps us see. It is a big, round place. Can you look at the stars?
Early Reader · Change the reading level on the articleAn observatory is a special place. People go there to look at things. They look at the stars and the sky. It helps us learn about our world. It is a fun place to study. Do you like to look at the stars?
Early Reader · Change the reading level on the articleA big group of stars lives in space. It looks like a bright ball. It has many stars inside. It is very large. You can see it in the dark sky. Can you find it?
Early Reader · Change the reading level on the articleA big cloud of ice is far away. It is at the edge of our space. It has many tiny icy balls. These balls can turn into comets. They fly toward our Sun. Can you see them in the sky?
Early Reader · Change the reading level on the articleA telescope helps us see far away. It uses glass or mirrors. It makes small things look big. You can see stars in the sky. It is fun to look at the moon. Do you want to look at the stars?
Early Reader · Change the reading level on the articleThings move in a big circle in space. A planet moves around a star. A moon moves around a planet. This path stays the same. It helps things stay in place. Do you like to look at the stars?
Early Reader · Change the reading level on the articleSpace ships move in paths. They go around planets. They follow special rules. These rules help us fly. We use them to reach the moon. Do you want to fly to space?
Early Reader · Change the reading level on the articleLook up at the night sky. You can see bright stars. They look like a hunter. This hunter is named Orion. He is easy to find in winter. Can you see his belt?
Early Reader · Change the reading level on the articleA big cloud glows in the sky. It is part of a giant sword. New stars grow inside the cloud. It helps us learn about space. It is very bright. Can you find it at night?
Early Reader · Change the reading level on the articleSpace is very big. We use a special way to measure it. It helps us find how far stars are. This helps us know where we are. It is a very long way. Can you imagine that big space?
Early Reader · Change the reading level on the articleScientists look at the stars. They use tools to see light. These tools measure how bright a star is. This helps us learn about space. It is a big job! Do you like looking at the night sky?
Early Reader · Change the reading level on the articleThe Pinwheel is a giant group of stars. It looks like a spinning wheel. It is very far away in the sky. It has many, many stars. It is a beautiful sight to see. Do you like looking at the stars?
Early Reader · Change the reading level on the articleA star can make a glowing cloud. This happens when a star gets old. It blows its outer parts into space. The cloud looks bright and colorful. It is very pretty to see. Do you like looking at the stars?
Early Reader · Change the reading level on the articleStars have many friends in space. These friends are planets. They move in big circles around the star. Our Sun has many planets too. It is a big family. Do you like to look at the stars?
Early Reader · Change the reading level on the articleSee the bright stars in the sky. They look like a small group. Many people call them the Seven Sisters. You can see them at night. They are very pretty to look at. Can you find them?
Early Reader · Change the reading level on the articlePluto is a small world. It is far from the Sun. It is made of ice and rock. Pluto has five moons. One moon is very big. It is called Charon. Do you like looking at the stars?
Early Reader · Change the reading level on the articlePolaris is a bright star. It stays in one spot at night. This helps people find their way. It is called the North Star. It is very pretty to see. Can you find it in the sky?
Early Reader · Change the reading level on the articleProcyon is a very bright star. It shines in the night sky. It is near our own Sun. Two stars live there together. One star is big and white. The other star is small. It is a close neighbor to us. Can you find it in…
Early Reader · Change the reading level on the articleA star starts as a tiny baby. It grows from clouds in space. It pulls in gas to get big. This helps it become a bright star. It is a very special thing to see. Can you look at the stars tonight?
Early Reader · Change the reading level on the articlePtolemy was a man who loved stars. He lived a long time ago. He wrote books about the sky. He also made maps of the world. His books helped many people learn. Do you like to look at stars?
Early Reader · Change the reading level on the articleSome stars blink in the sky. They spin very fast. They send out beams of light. It is like a lighthouse in space. We use them to tell time. Can you see the blinking star?
Early Reader · Change the reading level on the articleSome spots in space are very bright. They are far away. They look like tiny stars. These spots have a lot of power. They help us learn about space. Do you want to look up?
Early Reader · Change the reading level on the articleSome stars live in big groups. These groups send out bright light. The light is far away. It can reach us here. It helps us see space. Do you like to look at stars?
Early Reader · Change the reading level on the articleBig dishes listen to space. They catch sounds from stars. These sounds are very weak. The big dishes help us hear them. We can use them in the day. Can you hear the stars?
Early Reader · Change the reading level on the articleSome stars grow very big. They turn red and orange. They are much larger than our Sun. These stars are very bright. They can be seen far away. Do you like to look at stars?
Early Reader · Change the reading level on the articleLight can change color. It can look more red. This happens when things move away. It also happens as space grows. This helps us see far away stars. Do you like looking at the stars?
Early Reader · Change the reading level on the articleA bright ring sits in space. It looks like a glowing ring. A star made it. The star blew gas out into the sky. You need a telescope to see it. It is very pretty. Can you find it in the stars?
Early Reader · Change the reading level on the articleA giant black hole lives in our galaxy. It sits in the middle of our home in space. It is very big and very heavy. It pulls on things near it. We can see its glow in pictures. Can you find it in the stars?
Early Reader · Change the reading level on the articleSome galaxies have very bright centers. These centers shine like big lights. A giant black hole lives there. It pulls in stuff to make light. This helps us learn about space. Can you look at the stars?
Early Reader · Change the reading level on the articleSirius is a very bright star. It is in the night sky. It is near us in space. It looks like a shining light. People call it the Dog Star. Can you find it in the sky?
Early Reader · Change the reading level on the articleA small cloud of stars is in space. It is near our own home in the sky. It has many millions of stars. You can see it at night. It looks like a fuzzy patch. Can you find it?
Early Reader · Change the reading level on the articleThe Moon can hide the Sun. It moves in front of the Sun. This makes the sky dark. It looks like night for a bit. It is a cool thing to see. Do you want to see one?
Early Reader · Change the reading level on the articleThe Sun sends out a wind. It is a stream of tiny bits. This wind moves through space. It can push on a comet. It can even make lights in the sky. Do you see the sun?
Early Reader · Change the reading level on the articleThe sun moves in the sky. It changes every day. Sometimes the days are very long. Other times the days are very short. This helps make our seasons. Do you like the sun?
Early Reader · Change the reading level on the articlePeople went to space. They used big rockets. A dog went up first. Then a man went up too. It was very big news. Do you like the stars?
Early Reader · Change the reading level on the articleThe space shuttle was a big ship. It could fly into space. It could also land on a road. This helped people do science. It was a very special tool. Do you want to go to space?
Early Reader · Change the reading level on the articleSome star groups look like swirls. They have long arms. These arms have many bright stars. They also have gas and dust. We live in one too! Can you see the stars?
Early Reader · Change the reading level on the articleA small ball went into space. It was made of shiny metal. It sent sounds back to Earth. These sounds helped us learn. It was a big step for science. Do you like to look at the stars?
Early Reader · Change the reading level on the articleSome galaxies make many stars. They use lots of gas. This gas makes new stars fast. It happens when galaxies bump into each other. This makes the sky very bright. It is a busy place! Do you like looking at stars?
Early Reader · Change the reading level on the articleStars can live in big groups. These groups are called star clusters. Some groups have many old stars. Some groups have few young stars. They all stay together. Can you find them in the sky?
Early Reader · Change the reading level on the articleNew stars are born in space. They grow in big clouds of gas. These clouds are like nurseries. They help many stars grow at once. This makes a big group of stars. Can you see the bright stars?
Early Reader · Change the reading level on the articleSome stars live in groups. They pull on each other. They move in circles. This helps them stay close. It is like a dance in the sky. Do you like to look at stars?
Early Reader · Change the reading level on the articleA star can turn into a black hole. It happens when a big star dies. The star falls in on itself. This makes a very strong pull. It can pull in things nearby. It is a big mystery in space. Do you like looking at stars?
Early Reader · Change the reading level on the articleStars have many colors. Some stars are very hot. Some stars are cool. We use letters to group them. This helps us know about them. Can you find a star in the sky?
Early Reader · Change the reading level on the articleStars change over a long time. They start as clouds of dust. Then they grow into bright stars. They make light for us. This helps us see the sky. Do you like to look at stars?
Early Reader · Change the reading level on the articleStars move through space. They do not stay still. Some stars move very fast. This helps us learn about our sky. We can watch them move. Can you look at the stars tonight?
Early Reader · Change the reading level on the articleStars have a special pull. This pull is like a giant magnet. It moves things around the star. It can even make dark spots. These spots help us learn. It is very cool! Can you feel a magnet?
Early Reader · Change the reading level on the article