Why do we need the Hubble Space Telescope?
The telescope has helped scientists understand how planets and galaxies form. Galaxies contain billions of stars. A picture called “Hubble Ultra Deep Field” shows some of the farthest galaxies ever seen. Pictures from Hubble help scientists learn more about the whole universe.
What is the main reason to put a telescope in space?
The main reason we put telescopes into space is to get around the Earth’s atmosphere so that we can get a clearer view of the planets, stars, and galaxies that we are studying.
Why did Laika die?
Laika (Russian: Лайка; c. 1954 – 3 November 1957) was a Soviet space dog who became one of the first animals in space, and the first animal to orbit the Earth. Laika died within hours from overheating, possibly caused by a failure of the central R-7 sustainer to separate from the payload.
Where does space start?
In regards to orbital flight there are two competing definitions: the Kármán Line, an imaginary boundary located 62 miles (100 km) up, and 50 miles (80.5 km), which marks the top of the mesosphere, where most meteoroids vaporize.
Why is geostationary orbit so high?
A geosynchronous orbit is a high Earth orbit that allows satellites to match Earth’s rotation. This is because of the effect of Earth’s gravity; it pulls more strongly at satellites that are closer to its center than satellites that are farther away.
Is Moon a geostationary satellite?
No. A geostationary orbit means that the object stays above the same spot on the Earth and doesn’t appear to move. The Moon can be observed to rise and set, so it’s not in a geostationary orbit.
What is the lowest orbit possible?
There is an orbit around the Earth called the Low Earth orbit (LEO) with an altitude between 160-2000 km. This is the lowest altitude at which an object can go on orbiting around the Earth.
Why do geostationary satellites have to be above the equator?
Originally Answered: Why is the geostationary orbit necessarily above the equator? Because satellites orbit the center of mass of the planet which is in the center of the planet, more or less. So to orbit the Earth and stay above one place they need to orbit the equator.
Can a satellite stay still?
In celestial mechanics, the term stationary orbit refers to an orbit around a planet or moon where the orbiting satellite or spacecraft remains orbiting over the same spot on the surface. From the ground, the satellite would appear to be standing still, hovering above the surface in the same spot, day after day.