What can you never know about a black hole quizlet?

What can you never know about a black hole quizlet?

equal to the speed of light. Which of the following can you never know about a black hole? The elements of the material that has fallen in. Neutron stars have densities roughly the same as that of the atomic nucleus.

Where are pulsars most likely to be found?

Except for a few pulsars in our neighbouring galaxies, the Magellanic Clouds, most pulsars are found to be well outside of our solar system but within our Galaxy. The youngest pulsars (we call them young, but these pulsars are many thousands of years old) are found to lie within the plane of our Milky Way Galaxy.

Why don t all supernova remnants contain pulsars?

There are several reasons why most supernova remnants do not contain visible pulsars. Perhaps the original pulsar was ejected because there was a recoil from an asymmetrical explosion, or the supernova formed a black hole instead of a pulsar, or the beam of the rotating pulsar does not sweep past the solar system.

Why does our theory predict that neutron stars will spin rapidly?

We expect neutron stars to spin rapidly because they conserve angular momentum.

Why can we not detect black holes?

Black holes have gravitational fields so strong that even light cannot escape, so they are defined by the shell of a black, featureless sphere called an event horizon. But the holes can nevertheless be seen. As they consume matter that strays too close, they squeeze it into a superheated disk of glowing gas.

Why is it difficult to observe black holes?

Black holes are difficult to observe directly, since no light can escape from within the event horizon. Fortunately, when matter falls into a black hole, it becomes superheated and produces an intense source of light before it crosses the horizon.

What is the most common reason a pulsar in our galaxy might not be detected?

But even many young pulsars are invisible to us with radio telescopes because of their narrow lighthouse beams.

What is a method for identifying a black hole?

Black holes are detected as surrounding material (like gas) is funnelled by the force of gravity into a disk around the black hole. The gas molecules in the disk swirl around the black hole so fast that they heat up and emit X-rays. These X-rays can be detected from Earth.

What is one problem astronomers have to deal with when searching for pulsars?

Mysterious Missing Pulsars May Have Gotten Wrapped in Dark Matter and Turned Into Black Holes. The center of the galaxy should be chock-full of rapidly spinning, dense stellar corpses known as pulsars. The problem is, astronomers can’t seem to find them.

Are pulsars dead stars?

Pulsars, spinning dead stars made of densely packed neutrons, appear to blink on and off due to their lighthouse-like beams of radiation that sweep past Earth at regular intervals. Variations in the timing of those pulses can expose pulsars’ movements and effects of general relativity.

What keeps pulsars from collapsing?

Pulsars are kept from collapsing by neutron degeneracy pressure.

Why was it very rare to see a supernova in an elliptical galaxy?

Supernova explosions of massive stars are common in spiral galaxies like the Milky Way, where new stars are forming all the time. They are almost never seen in elliptical galaxies where star formation has nearly ceased. As a result, astronomers were surprised to find a young-looking supernova in an old galaxy.

Do black holes spin faster than neutron stars?

Over time, the radiation streaming from the neutron star strips away its angular momentum, and it slows down. Black holes can spin even faster than that.

Are neutron stars that have magnetic fields 100 times stronger than the average neutron star?

Earth’s magnetic field is around 1 gauss, and the sun’s is around a few hundred gauss, according to astrophysicist Paul Sutter. But a neutron star has a trillion-gauss magnetic field. Magnetars have magnetic fields a thousand times stronger than the average neutron star.

When we find neutron stars that are spinning rapidly they are called?

Pulsars are rotating neutron stars observed to have pulses of radiation at very regular intervals that typically range from milliseconds to seconds. Pulsars have very strong magnetic fields which funnel jets of particles out along the two magnetic poles.

What is unusual about a black hole?

Black holes are some of the strangest and most fascinating objects in space. They’re extremely dense, with such strong gravitational attraction that not even light can escape their grasp. The Milky Way could contain over 100 million black holes, though detecting these gluttonous beasts is very difficult.

What are some unanswered questions about black holes?

Black Hole Questions

• Are there different types of black holes?
• Can you go fast enough to get enough mass to become a black hole?
• Does every black hole contain a singularity?
• How can there be anything left in the universe? …
• How can you tell a black hole made out of antimatter from a black hole made out of matter?

What are unanswered questions about black holes?

Let’s dive in to find out the unanswered questions about these objects.

• What is a black hole? …
• What is Event Horizon in a black hole? …
• How Are black holes formed? …
• Do black holes really exist? …
• Who discovered black holes? …
• What happens if you fall into a black hole? …
• Which is the nearest black hole to Earth?

What are 3 interesting facts about black holes?

10 Fun Facts About Black Holes

• You Can’t Directly See a Black Hole. …
• Our Milky Way Probably Has a Black Hole. …
• Dying Stars Lead to Stellar Black Holes. …
• There are Three Categories of Black Holes. …
• Black Holes Are Funky. …
• The First Black Hole Wasn’t Discovered Until X-Ray Astronomy was Used.