If you want to create your own signs or banners, you can print large letters on single pieces of paper to put them together. The easiest way to do this is to use word processing programs such as Word 2013. You can print one letter per page, but you may need to experiment to get the right font size.reate a new document. Select the font you want to use from the drop-down list in the Font section of the toolbar at the top of the page. Common options include Times New Roman, Arial and Helvetica. Click the Center icon in the Paragraph section on the toolbar, if you want to center your letter on the page.
The star that created the Crab nebula exploded in the year 1054.
At the center of the nebula lies the Crab Pulsar, a neutron star (or spinning ball of neutrons), 28â30 km across, which emits pulses of radiation from gamma rays to radio waves with a spin rate of 30.2 times per second. The nebula was the first astronomical object identified with a historical supernova explosion.he nebula was observed by John Bevis in 1731; it corresponds to a bright supernova recorded by Chinese and Arab astronomers in 1054. At X-ray and gamma-ray energies above 30 KeV, the Crab is generally the strongest persistent source in the sky, with measured flux extending to above 10 12 eV.