What is the stellar process in which the fusion of hydrogen produces other elements?
Stellar nucleosynthesis
Who is the astrophysicist who first advanced the idea that the chemical elements originated from hydrogen in stars?
Hubert Reeves
Which elements are created in stellar nucleosynthesis quizlet?
nucleosynthesis? were created from hydrogen and helium by stellar nucleosynthesis some of these elements are particularly those that are lighter than iron.
What is the material sent into space by a supernova?
This shock wave compresses the material it passes through and is the only place where many elements such as zinc, silver, tin, gold, mercury, lead and uranium are produced. Over several months the gases cool and fade in brightness and join the debris of interstellar space.
Why do supernovas explode?
It’s a balance of gravity pushing in on the star and heat and pressure pushing outward from the star’s core. When a massive star runs out of fuel, it cools off. This causes the pressure to drop. The collapse happens so quickly that it creates enormous shock waves that cause the outer part of the star to explode!
What is left after a star dies?
Stars die because they exhaust their nuclear fuel. Once there is no fuel left, the star collapses and the outer layers explode as a ‘supernova’. What’s left over after a supernova explosion is a ‘neutron star’ – the collapsed core of the star – or, if there’s sufficient mass, a black hole.
How many stars die each day?
We estimate at about 100 billion the number of galaxies in the observable Universe, therefore there are about 100 billion stars being born and dying each year, which corresponds to about 275 million per day, in the whole observable Universe.
How far is the farthest star in our galaxy?
13.4 billion light-years
What is the smallest star?
EBLM J0555-57
What is the closest star from Earth?
Proxima Centauri
How close is the nearest star in light-years?
about 4.37 light-years
How far away can we see in space?
30 billion light-years away
Can Hubble see the moon?
The moon is a difficult target for Hubble because it moves across the sky faster than Hubble can track it and is very dim in ultraviolet light. The observations required steady, precise, as well as long exposures to search for the resources.
Does the universe have an end?
It never ends, but it’s also constantly expanding. Scientists don’t think there is a true edge of the universe.
Where does space end?
No, they don’t believe there’s an end to space. However, we can only see a certain volume of all that’s out there. Since the universe is 13.8 billion years old, light from a galaxy more than 13.8 billion light-years away hasn’t had time to reach us yet, so we have no way of knowing such a galaxy exists.
Can space be created?
3 Answers. Yes, space is constantly being created. The new space does not hold any matter (like atoms) or dark matter. This means that the density of normal and dark matter decreases at the same rate as the volume increases.
Does time ever end?
According to Einstein’s General Relativity, which is our best current description of space and time, the only place where time – and also space – ends is in a so-called singularity. This involves gravitational forces becoming so intense that space and time lose all meaning.
What happens to your body if you die in space?
If you do die in space, your body will not decompose in the normal way, since there is no oxygen. If you were near a source of heat, your body would mummify; if you were not, it would freeze. If your body was sealed in a space suit, it would decompose, but only for as long as the oxygen lasted.
What happens if an astronaut gets pregnant in space?
The primary problems with becoming and remaining pregnant in space are radiation and low-gravity environments. It’s important to understand both. Radiation can affect a man’s sperm count, rendering him infertile, possibly permanently. It can also harm a developing fetus.
Do female astronauts wear bras?
According to this Salon article[1], yes they do. They don’t need the support, but the bra keeps their wobbly bits in place while floating around in microgravity. They also like having an extra layer between said bits and the cameras all over the space station.