Why Are Planets Round?

You may have wondered why are planets round. I mean why aren't the cubes or pyramids? The answers can be found in how gravity works and the formation of our solar system. Our solar system was formed like many other star systems from a nebula. A nebula is a concentrated area of gases and cosmic dust in what is the called the ISM or Interstellar Medium. These gases and dust are spread through space and when enough of it gathers it gains suitable gravity to establish a gravitational field. This clumping creates nebula's and started the process for star formation.

The next step in a stars birth would be the rotation of the nebula. As matter is drawn in and organized by the nebula's increasing gravitational field it start to gain angular momentum and start to rotate. This is just like how an ice skater spins faster when they pull in their arms. As the matter is pulled into the nebula’s center of mass, it spins faster making it easier for more matter to be pulled in. This process will happen until under the increasing gravity until the gases go under nuclear fusion and a star is born.

After the birth of a star there are now two sources of gravity whose tides fight over the remaining gases and dust. The first gravitational field is that of the nebula and the other is the gravity of the new star. The tidal forces of these two fields bunch the remaining gases and dust together. Heavier element will clump together faster to make the beginnings of rocky planets. It is important to note that gas giants are planets that were close to becoming stars but did not reach critical mass for fusion. In the end, even as these planets are forming they still carry over the angular momentum and spin as well drawing more matter.

This process works like a carpenter’s lath. The new gravitational field pulls matter towards the center of the planet’s mass. The rotation helps to round out the rough edges. As time passes and the planet cools the planet settles into its final shape depending on its own rotation and the gravitic influence of its star. This is what makes a planet round.

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What do astronauts eat?

What do astronauts eat?

Astronauts in space eat many of the same things that you eat at home. They can eat beef, chicken, eggs and even dessert. The difference is that when you eat in zero gravity, the food — liquids and solids, even crumbs — can float away. But scientists have come up with ways to package it so that the food ends up in the astronaut’s stomach and not on the ceiling of the spacecraft.

Technology has advanced since the early days of space flight. Today, astronauts can make their own menu from a variety of foods and drinks. All the astronauts need is water and an oven. Before the flight, astronauts get to choose what food they will take with them. The astronauts taste different things and give them a score. The highest rated foods get on the menu, though a dietician has the final say on the menu. The food has to be nutritious with enough vitamins and minerals. Astronauts need more of some vitamins and less of others when they are in space.

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50 Facts on Plants

•  50 Facts on Plants
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• An average size tree can provide enough wood to make 170,100 pencils !

• The first type of aspirin, pain killer and fever reducer came from a the tree bark of a willow tree !

• 85% of plant life is found in the ocean !

• Bananas contain a natural chemical which can make people feel happy !

• Brazil is named after a tree !
• The Amazon rainforest produces half the world’s oxygen supply!

• Cricket bats are made of a tree called Willow an dbaseball bats are made out of wood Hickory tree !

• Dendrochronology is the science of calculating a tree’s age by its rings !
• Caffeine serves the function of a pesticide in a coffee plant ! 
• Apple is 25% air, that is why it floats on water !

• Peaches, Pears, apricots, quinces, strawberries, and apples are members of the rose family !
• Apple,potatoes and onions have the same taste, to test this eat them with you nose closed!
• The tears during cutting an onion are caused by sulfuric acid present in them !

• The tallest tree ever was an Australian eucalyptus – In 1872 it was measured at 435 feet tall!
• The first potatoes were cultivated in Peru about 7,000 years ago!

• The evaporation from a large oak or beech tree is from ten to twenty-five gallons in twenty-four hours!
• Strawberry is the only fruit that bears its seeds on the outside.The average strawberry has 200 seeds !

• Leaving skin on potatoes while cooking is healthier as all the vitamins are in the skin !
• Around 2000 different types of plants are used by humans to make food!
• Small pockets of air inside cranberries cause them to bounce and float in water!
• Bamboo is the fastest-growing woody plant in the world; it can grow 35 inches in a single day!

• A sunflower looks like one large flower, but each head is composed of hundreds of tiny flowers called florets, which ripen to become the seeds!

• Cabbage has 91% water content!

• Banana is an Arabic word for fingers!
• The California redwood (coast redwood and giant sequoia) are the tallest and largest living organism in the world !

• Ginkgo (Ginkgo biloba) is one of the oldest living tree species, it dates back to about 250 million years ago !
• The word pineapple comes from European explorers who thought the fruit combined the look of a pinecone with flesh like that of an apple !

• The Elephant grass found in Africa is named so as it it 4.5 meters high and even elephant s can hide in it!
• Eating lots of onions will make you sleepy, as it acts as a sedative!

• A cucumber is a fruit and not a vegetable since it has seeds in the centre!

• A cluster of bananas is called a hand and consists of 10 to 20 bananas known as fingers !
• Vanilla flavoring comes from the pod of an orchid, Vanilla planifolia!
• The first certified botanical garden was founded by Pople Nicholas III in the Vatican City in 1278 AD!
• There are over 300,000 identified plant species and the list is growing all the time!
• Oak trees are struck by lightning more than any other tree!

• Carrots were originally purple in colour!
• During the 1600s, tulips were so valuable in Holland that their bulbs were worth more than gold. The craze was called tulip mania and caused the crash of the Dutch economy!
• The baobab tree found in Africa can store 1,000 to 120,000 liters of water in its swollen trunk!

• Oak trees don’t produce acorns until they are 50 years old !
• Caffeine serves the function of a pesticide in a coffee plant !
• At over 2000 kilometers long, The Great Barrier Reef is the largest living structure on Earth !
• The first product to have a barcode was Wrigely’s gum !

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