Watch an asteroid approach a star and block its light, all in a fraction of a second.
Occultations of stars and planets by the Moon and asteroids are exciting to watch, and amateur occultation timings can have real scientific value. But first you need to know what occultations will be happening in your area.
The Moon frequently passes in front of stars. In rare cases, planets and asteroids will also obscure starlight for a short time. Here are some basic definitions that will help you understand what occultations are about.
Many households now possess a camcorder. Many amateur astronomers may be unaware that these devices are sensitive enough to record occultation events.
Watch in your telescope as the edge of the Moon snaps a star out of sight.
Lunar and planetary occultations may be appreciated for their intrinsic beauty, but in order to contribute scientifically valid data you need to apply certain techniques.
No matter where you live in the world, you can see the Moon hide stars and planets in its path. Here's when and where you can watch dozens of these events this year.
Set your alarm clock to watch the last-quarter Moon cross a first-magnitude star on the morning of March 3rd.
Mobile observers with video cameras, capable of filling gaps between those at fixed sites, are especially needed to observe asteroid occultations.
No matter where in the world you live, you can see the Moon hide stars and planets in its path. Here's when and where you can see dozens of lunar occultations this year.
Here's a blue-sky project if ever there was one. The thin waning crescent Moon will occult the second-brightest planet as seen from much of North America on Tuesday, November 9th.
You've got plenty of chances to see an asteroid or planet pass in front of a star this year and here's when and where to see them.
Late Friday night, November 1415, Saturn and its ring system glide right in front of an 8.4-magnitude star in Gemini.
North Carolina skywatchers have a chance to see the asteroid 72 Feronia pass in front of an 8th-magnitude star around 2 a.m. Eastern Standard Time on November 5th.
On Tuesday November 25th, Saturn and its ring system glide in front of an 8.3-magnitude star in Gemini, the second time Saturn has occulted a star in 10 days.
No matter where you live, there are plenty of chances to see an asteroid pass in front of a star this year.
Dozens of times this year, no matter where you live, the Moon can be seen hiding bright stars in its path. Here's when and where you can watch the Moon occult these stars.
On Sunday evening, October 26th, Venus disappears behind the crescent Moon for observers in South America and Hawaii.
During the night of January 45, North American observers are well positioned to watch Saturn transit the face of M1, the Crab Nebula. But will the glare from the planet obscure the nebula?
On the evening of the 16th, skywatchers across northern Europe will see the Moon occult Saturn. The occultation takes place at midday in northwestern North America.
North American observers can see a 7th- and a 10th-magnitude star occulted by asteroids this month. Here's when and where to look.
For more than 300 cities throughout North America, the following table tells when the planet Saturn will be covered by the Moon. This event takes place in the afternoon or evening hours of Wednesday, February 20th. Cities are grouped by state or province. First click on the abbreviation of your state or province (listed...
North American observers can see two 10th-magnitude stars occulted by asteroids this March. Here's where to look.
Five dozen of these spellbinding events, impossible to predict well until recently, are listed for observers worldwide.
There will be other occultations of Saturn this year but none with February's prime-time appeal for North American observers.