There are slightly more than one and a half partial or total lunar eclipses per year, on average. However, you can't see them if they occur when it's daytime where you are, so the number you can see is a bit less.
A person living in a given spot can reasonably expect to see a lunar eclipse slightly less often than once per year, weather permitting.
Never, really. Each of the planets orbit in slightly different planes, so they never COULD line up exactly. And the outer planets orbit so slowly, taking dozens or hundreds of years per orbit.
Do a COUPLE of the planets ever line up? Yes. We call this a "transit", when two planets line up so exactly that you can see one in front of the other. From Earth, we can see transits of Venus (when Venus moves across the face of the Sun) twice per century, and theoretically, from Mars we could occasionally see transits of Earth. But the outer planets don't ever "line up".
July 17, 2205.
However, there are some relatively close misses in this century.
The NASA Solar Eclipse Calculator for North America is at the link below:
http://eclipse.gsfc.nasa.gov/JSEX/JSEX-NA.html
August 21, 2017.
The path of totality will cross the entire country from Salem, OR to Casper WY to Grand island, NE to St. Joseph, MO to just south of St. Louis to Nashville, TN to just north of Charleston, SC.
I recommend that you make your hotel reservations NOW if you plan to travel to the observe this eclipse.
The next total solar eclipse will occur on July 22, 2009. The path of totality starts in northern India, crosses China, and goes across the Pacific Ocean. This eclipse will not be visible from Europe, Africa, or the Americas.
The next total eclipse that crosses North America will be on August 21, 2017. This one will be visible in a path from Charleston SC to Seattle, WA.
Approximately never; it depends on what you mean by a "planetary alignment". The planets NEVER all line up in a row like beads on a string.
Sometimes two planets will line up; for example, twice per century, we can see a "transit of Venus" when we can see the disk of Venus silhouetted on the Sun, or a transit of Mercury when Mercury appears to cross the Sun. (These never happen together.)
When we set up colonies on Mars, we'll be able to observe a "transit of Earth", when the Earth will cross the face of the Sun - but never at the same time when Mercury or Venus do.
However, we often see a string of planets visible in the sky together; this month, for example, Mercury, Venus, Mars and Jupiter are all close together in the pre-dawn sky. But that's not really an "alignment"; just a pretty trick of perspective as seen from the Earth.
There's no connection between alignment of planets and any particular time of day.
Remember that whatever time of day you choose, it's ALWAYS that time of day
somewhere on Earth.
I don't think that all the planets have ever been "in line with each other", and I doubt they ever will, at least on a timescale that matters to humans (over billions of years, it might happen a couple of times; it's difficult to predict, since planetary orbits change very slowly over time). It occasionally happens that several planets happen to be on roughly the same side of the Sun; this happened for six planets a few months ago.
If you're asking because you've heard this was going to happen in December 2012... sorry, no. It's a lie, just like every other doomsday prediction for December 2012.
Some planets get aligned several times per year. It is called a conjunction.
Although this is correct it's not all there is to the story. A mutual occultation (total alignment) of planets, although rare, does happen. The next alignment will be approximately November 22, 2065
All the planets NEVER* line up.
*probability is 1 in 8.6 x 1046 years. sun will only last about 10 billion (1010) years
no. the moon is going through one of its phases, but a lunar eclipse will not always happen during this as a lunar eclipse can happen in any phase.
When the conditions are right, a lunar eclipse can happen in ANY month, but only at the time of Full Moon.
a lunar eclipse only happens when the moon is completly full
Lunar eclipses happen at the full moon.
When you posted this question, the eclipse was already over.
Yes, just about every 4 years. The next lunar that can be seen throughout the entrie northern hemisphere is in the winter of 2014
yhe next lunar eclipse will happen in 2 years
A lunar eclipse can happen only when the Moon is full.
no. the moon is going through one of its phases, but a lunar eclipse will not always happen during this as a lunar eclipse can happen in any phase.
There will be a penumbral lunar eclipse on August 6, 2009 (you won't notice it), and a partial lunar eclipse on December 31, 2009, visible from the Eastern Hemisphere.
The lunar eclipse can only happen when the moon is full.
When the conditions are right, a lunar eclipse can happen in ANY month, but only at the time of Full Moon.
yes
a lunar eclipse only happens when the moon is completly full
In 2089 The Eclipse Will Happen Ireland In Co.Louth Dundalk .There will be a total lunar eclipse on December 10, 2011.
Lunar Eclipses happen on average twice a year.
Lunar eclipses happen at the full moon.