Orthostatic hypotension (also called postural hypotension) is a sudden fall in blood pressure that occurs upon standing quickly. Blood pressure is the force of your blood against the walls of your arteries (the blood vessels that carry blood from the heart through the body). Hypotension is the term for low blood pressure. When you stand up, gravity pulls blood into your legs, and your blood pressure begins to fall. Certain reflexes in your body compensate for this change. Your heart beats faster to pump more blood, and your blood vessels constrict to prevent blood from pooling in your legs.
There are literally thousands of man made objects in space, such as parts of old space rockets sent up by Russia, China, Europe and the USA etc, lots of military and civilian satellites used for communication, navigation, research and reconnaissance, space probes sent to explore planets like Mars, the Hubble Space Telescope used to look deep into ...
Best Answer: Voyagers 1 and 2 are the farthest manmade objects: - Voyager 1 is at 109 AU from the sun-Voyager 2 is at about 88 AU from the sun (by the way, an AU is the average distance from the Earth to the sun).ut the Hubble Space Telescope (which-is-a satellite, orbiting the earth) has photographed things billions of light year away, and those would be much farther than we could reach with a spacecraft. It's That Guy Â· 7 years ago. Thumbs up.