Microsoft unveiled WorldWide Telescope, a Web-based software application that allows virtual space exploration by knitting together pictures of the universe.
virtual
adjective
1 [before noun] almost a particular thing or quality:
Ten years of incompetent government had brought about the virtual collapse of the country's economy.
War in the region now looks like a virtual certainty.
2 describes something that can be done or seen using a computer and therefore without going anywhere or talking to anyone:
virtual shopping/banking
virtual reality noun [U]
a set of images and sounds produced by a computer, which seem to represent a place or a situation that a person can experience or take part in
virtually
adverb
almost:
Their twins are virtually identical.
That wine stain on my shirt has virtually disappeared.
knit (JOIN) Hide phonetics
verb [I or T] knitting, knit, knit
to join together:
The broken bone should begin to knit (together) in a few days.
The two communities are closely knit by a common faith.
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