Windows 10: digging hole problem

Hello, i always have problem when i dig a hole in something. Many "scratch" appear around that hole and when you have many hole to pierce, it is a disaster. piercing = substraction. i use french version

:)

 

Black Holes

New research reveals hundreds of black holes hiding in NGC 6101​

• Computer simulations of a spherical collection of stars known as NGC 6101 reveal that it contains hundreds of black holes, until now thought impossible

• Recent observations already found black hole candidates in similar systems, with this research enabling astrophysicists to map black holes in other clusters

• These systems could be the cradle of gravitational wave emission, 'ripples' in the fabric of spacetime

 

Windows 10 1709 System Restore problems...

That seems to be an attempt at Option 2 in the tutorial, which requires you to
a. Boot to a command prompt (Did you?)
b. You then seem to be mixing steps 3,4 and 5, thus your command is incorrect.

I suggest Option 1 is easier.

If you still have problems, please repost listing each specific step and saying which option from the tutorial you are using. Thanks.

 

Black Holes

Three merging galaxies 1.8 billion ly away form a black hole 3 billion times the mass of the Sun

• Monster black hole is 750 times bigger than the black hole at the center of the Milky Way

• Cosmic gas in merging galaxy is moving at ~ 600 km/s [~500 times the speed of a rifle cartridge]

Black holes grow by drawing in material including other black holes that venture too close, and in this case the black holes from the three galaxies have merged.

Dr Lisa Harvey-Smith from CSIRO Astronomy and Space Science and her team knew of a strong source of radiowaves, known as an astrophysical maser, in the group and pointed the array of antennas toward it. Knowing the speed of the gas they were able to directly measure the mass of the black hole that was causing the gas to swirl.

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