An asteroid expected to fly past Earth in will be visible to the naked eye, scientists projected Thursday. It's a once-in-a-millennium event. And you may want to buy plane tickets now, as the flyby will be visible only from Europe, Africa and western Asia. There has been no event like this in modern history. Some people have seen dramatic fireballs created by small space rocks blazing through Earth's atmosphere.
Closest Flyby of Large Asteroid to be Naked-Eye Visible
How to see the spectacular comet Neowise with the naked eye | New Scientist
By Will Gater. Comet Neowise as seen from the UK in the early hours of 11 July. A comet discovered earlier this year by an orbiting NASA observatory is delighting stargazers in the northern hemisphere while it whips through the inner solar system, as it is currently bright enough in the night sky to be visible without binoculars or a telescope. In the past few weeks, Neowise has developed a spectacular, curving tail composed of dust particles ejected from the main body of the comet as it is warmed by the sun. This dusty trail catches sunlight, causing the comet to shine in the night sky.
The comet is currently bright enough to be seen with the unaided eye, if you know where to look. To see it, head outside at least 45 minutes before sunrise and look just above the northeastern horizon. The bright star Capella can serve as a marker, as the comet lies just below it, while the brilliant planet Venus is visible to the east. Beginning around mid-July, the comet will be visible in the northwestern sky after sunset, arcing slowly upward beneath the stars of the Big Dipper.
A great comet is a comet that becomes exceptionally bright. There is no official definition; often the term is attached to comets such as Halley's Comet , which during certain appearances are bright enough to be noticed by casual observers who are not looking for them, and become well known outside the astronomical community. Great comets are rare; on average, only one will appear in a decade. Although comets are officially named after their discoverers, great comets are sometimes also referred to by the year in which they appeared great, using the formulation "The Great Comet of