Life on other planets

There is no possibility of life on halley's comet. There is no liquid water, no oxygen atmosphere but it's tail has a magnetic field. Halley's comet nucleus is only made up of rocky and icy particles that contain ammonia, carbon dioxide, carbon monoxide, and methane. I think there is no life on the comet because it doesn't have the elements requiered to have life.

As soon as Galileo first pointed at Mars and realized that is another planet, similar to Earth, people have wondered if there is life on Mars. Mars is one and a half times as far from the sun as we are. On 1677 an astronomer observed that there were markings that looked like channels where water would flow. I do not think there is life on Mars because its atmosphere is mosltly CO2 and some say the markings were windblown dust on the surface.

Distance of Haley's comet

We can measure space through many units. The are kilometers, Astronomical unit and light years. All of these units have many differences, each are used different depending on the distance of an object. Kilometers are used when an object is near earth, we can't use km when an object is too far. Astronomical unit is used by the distance from earth to the sun, it is about approximately 149,600,000 km away. AU is only used within the solar system. Finally there is the measure of light years, and it is used to measure far things in space, light years means the distance traveled by light in one year.

For October 26, 2008, Halley's comet was at 31.7 AU from earth. 31.7 AU is equivalent to 4.74 billion kilometers. It would take a really long time to get to halley's comet because it is really far from earth. I think humans will get there some day when they have good technology, halley's comet is outside the solar system and we don't have that kind of technology now.

halley's comet formation

Halley's comet was made when a nebula was formed by a supernova. That gas and dust from the nebula collects, and later it freezes in cold outer system. That gas forms into icy objects and those objects accrete(objects come together). Those icy objects formed Halley's comet making it a rocky and an icy object. Later the sun's gravity pulls Halley's comet to orbit it. While coming to the inner layer of the solar system, some gases of the comet warm up and that is why scientists found hot and cold gases on Halley's comet.

PLUTO not a planet?

Scientists have found that Pluto is not a planet. How is this? Well they discovered another object bigger than Pluto which name is Eris. For an object to be a planet it has to govern all the objects around it and Pluto is smaller than Eris, so it does not govern the planet.

Halley's comet is not a planet because it is not spherical, it doesn't orbit any star and it doesn't have any gravitational pull to control the objects around it. Halley's comet is a rock who orbits its on orbit.

Halley's commet compared to the sun

The size in diameter of Halley's commet is 1024 km and the sun has a diameter of 1,400,000 km
The sun is much bigger than Halley's commet therefore Halley's commet fits 1367 times into the sun.

The sun is bigger than Halley's commet even though Halley's commet tail extended to 30 million km.

1024 diameter

INFO ON HALLEY'S COMMET

Halley's Commet

Who discovered it?... Edmund Halley
When did he discover it?... In 1676
How did he discovered it... He was looking at the sky and recognized a comet, he later predicted the date of when it was going to appear again.

TRIP TO AMNH

Me and my class went to the Museum of Natural History and looked at many exibits. we went to the Rose center , to the meteorites exibit, and also went to see a movie. We learned about our sun, stars, meteorites, and other planets.

When we went to the Meteorites exibit we looked at the different textures and different types of meteorites. we also looked at other things that connect to meteorites, just like meteors and shooting stars. I learned the differences of meteors and meteorites which are that meteors burn up before reaching the ground and turn into shooting stars. Meteorites are bodies that survive the trip through out through the atmosphere and reach earth's surface.

When we went to the Rose center exibit we could see each planet and learned about each of them, we could also learn about the sun and weight our self in a scale that tells what our weight would be.

I also learned a lot about the movie. I learned that the sun won't always shine, but it won't explode because only 1% of stars do that. I learned that the universe is much hotter than it was before and also that the stars keep forming and also dying.

My questions are why can't we go further on space to explore more things and get to know more of our planets? aren't we supposed to have our equipment? and also why don't black holes absorb all the universe?