pulsars 1
pulsars are rotating______?
neutron stars
A star with the mass of the sun will never become a neutron star, instead, our star will end its life having run out of hydrogen to fuse into ____
helium as a smoldering stellar remnant called a white dwarf.
If the star was massive enough to overwhelm this effect the neutron star would continue to collapse until it transforms into a ______
black hole
According to NASA, the material that comprises neutron stars is so dense that a mere teaspoon of it would weigh 4 billion tons. This is equivalent to________ empire state buildings stacked on a tiny spoon
10,000
As the collapse proceeds the outer layers of the star are blown away in a supernova explosion with only the
iron core of the massive star containing masses equivalent to that of the sun up to about 1.5 times that of our star remaining.
Even though the light is constantly shining, you only see the beam when it is pointing directly in your______
direction.
their light output is mostly_____
consistent
pulsars give off_____
radiation
There are two types of pulsars, ones with periods of a few milliseconds with this periodicity changing very slowly over time, called millisecond pulsars, and other pulsars which are just called
'ordinary pulsars.'
Like all neutron stars, pulsars are born when stars with masses between four and eight times that of the sun run out of________
fuel for nuclear fusion
A MYSTERIOUS gamma-ray glow in the inner parts of our galaxy could be due to thousands of dead stars spinning at______
hundreds of times a second.
This also means that the name 'pulsar' may actually be misleading as these neutron stars don't actually pulse by periodically shrinking and swelling in size, as astronomers once thought. Their pulsing is merely a factor of their
orientation in relation to our view of them
Imagine this as a pair of open scissors spinning on one handle. One blade points upwards, this is the axis of rotation, while the other blade is the________
is the beam of light.
we see pulsars turn on and_____
and off as the beam sweeps over Earth.
Even though pulsars were first discovered as radio sources they have now been observed using optical,_______
X-ray and gamma-ray telescopes.
One way to think of a pulsar is like a lighthouse. At night, a lighthouse emits a beam of_____
light
Jocelyn Bell noticed________
small pulses of radiation
ever team has a chance to guess this one closest gets the points
Pulsar astronomers have now detected over_____
guess somewhere between 1400 & 2000
1500
The Parkes radio telescope in Australia has found more than_______ as many pulsars as other radio telescopes
twice
when were people discovering pulsars_____
1967
These millisecond pulsars are formed from the remnants of stars that have used up all their______
fuel
pulsars give radiation of in how much time _____ & _____
seconds or milliseconds
Pulsars have very strong magnetic fields which funnel jets of particles out along the two______
magnetic poles
The first pulsar was discovered by chance by______&________
Jocelyn Bell & Anthony Hewish
pulsars have strong magnetic______
fields