Amateur astronomers watch the night sky during the Perseids | Perseid meteor shower.

Amateur astronomy is usually associated with viewing the night sky when most celestial objects and events are visible, but sometimes amateur astronomers also operate during the day for events such as sunspots and solar eclipses.

Amateur astronomers often look at the sky using nothing more than their eyes, but common tools for amateur astronomy include portable telescopes and binoculars.

Amateur astronomers use a range of instruments to study the sky, depending on a combination of their interests and resources.

Amateur astronomers also use star charts that, depending on experience and intentions, may range from simple planispheres through to detailed charts of very specific areas of the night sky.

Amateur astronomers often like to keep records of their observations, which usually takes the form of an observing log.

Amateur astronomers engage in many imaging techniques including film and CCD astrophotography.

Amateur astronomers have made significant contributions to the profession and hobbyists have made discoveries such as a celestial body or celestial event.

Amateur astronomers have contributed to many important astronomical discoveries, and astronomy is one of the few sciences where amateurs can still play an active role, especially in the discovery and observation of transient phenomena.

Amateur astronomers can do useful scientific study of variable stars by visually comparing the star with other stars within the same telescopic field of view of which the magnitudes are known and constant.

Amateur astronomers and amateur telescope makers also use homemade equipment and modified devices.

Category: Amateur astronomers

Category: Amateur astronomers

The International Fellowship of Rotarian Amateur Astronomers ( IFRAA ) is a fellowship group of amateur astronomers which spans the continents.

Category: Amateur astronomers

Amateur astronomers use such instruments as the Newtonian reflector, the Refractor and the increasingly popular Maksutov telescope.

Amateur astronomers tend to refer to telescope eyepieces by their focal length in millimetres.

Category: Amateur astronomers

Category: Amateur astronomers

Category: Amateur astronomers

Category: Amateur astronomers

Amateur astronomers have been successful at discovering Kreutz comets in the data available in real time via the Internet.

During this time the park manager allows amateur astronomers including the Minnesota Amateur Astronomers, MNAA, to use the park and facilities.

Category: Amateur astronomers

Amateur dramatics is the performance of plays or musical theater, often to high standards, but lacking the budgets of professional West End or Broadway performances.

Indianapolis, headquarters of the National Collegiate Athletic Association and often referred to as the " Amateur Sports Capital of the World " has hosted a number of collegiate basketball events.

Thornbury Amateur Dramatic Society ( TADS ) perform several plays each year, often in the Armstrong Hall or the adjacent Cossham Hall.

Throughout this period, Grossmith continued to perform his sketches, often late at night after performing at the Savoy, and continued to write new sketches, such as Amateur Theatricals ( 1878 ), A Juvenile Party ( 1879 ), A Musical Nightmare ( 1880 ), and A Little Yachting ( 1886 ).

Amateur British companies followed suit, as many dropped it from their repertory of the Gilbert and Sullivan operas during these three decades, although American companies often continued their regular rotation of the eleven operas from Trial through The Gondoliers.

Amateur pianists in the home often kept track of the doings of the leading pianists and composers of their day.

Amateur winemakers often use glass carboys in the production of their wine ; these vessels ( sometimes called demijohns ) have a capacity of 4. 5 to 54 liters ( 1. 2 – 14. 3 US gallons ).

* Amateur radio operators often use the number 73 as an abbreviation for " best regards ", typically when ending a QSO ( a conversation with another ham ).

Amateur cricketers often have to use old balls, or cheap substitutes, in which case the changes in the condition of the ball may not be experienced in the same manner as that which occurs during an innings of professional cricket.

Although always accessible to an amateur's budget, projects from " The Amateur Scientist " were often elegant and quite sophisticated.

As a national figure in the Democratic Party, he often feuded with fellow Democrat Governor Pat Brown ( 1959 – 67 ) and was a case-study in the James Q. Wilson treatise on machine politics, The Amateur Democrat.

* Amateur radio requires the callsign to be stated at the end of a communication and every ten minutes during ( some hams use countdown clocks to remind them to identify ); modes such as packet radio and fast-scan television often have a provision for automatic identification, either including it as part of a digital data stream or overlaying it over an analog picture.

* Repeater systems used in both the Land Mobile and Amateur Radio services often have provisions for announcing the repeater's call sign, either in voice or Morse code.

Amateur television operators often use a lower third or bug containing their callsign in lieu of voice identification.

He is called the " Amateur Cracksman ", and often, at first, differentiates between himself and the " professors " professional criminals from the lower classes.

Amateur biblical scholars often forget that when compared in context to the rest of the sentence ( in a Torah verse which indicates singular usage ), the Hebrew term " gods " is actually a Semitic elative meaning the one God YHWH ( see the original term in Hebrew, Elohim ); thus, Aaron's famous response to the unruly Israelites after he is forced to cast the Golden Calf could be seen as a bitterly sarcastic condemnation of their assumption of God's likeness, even after he consents to their demands.

Historically, from before the dominance of the professional game in the mid 20th century, the British and U. S. Amateur Championships are also often considered men's majors.

Amateur teams ( e. g., college or high school ) often do not differentiate between placekickers and punters, have different players assume different placekicking duties ( for example, one person handles kicking off, another kicks long field goals, and another kicks from shorter distances ), or have regular position players handle kicking duties.

Amateur clam digging is often done using a straight long-handled spading fork or a spading shovel.

This was most likely a response to the fact that less than half of all U. S. Amateur qualifiers are 25 or older, and most older golfers found themselves disadvantaged in competing against college golfers who typically play much more often.

Amateur movie footage of current events can also often fetch a high price on the market – scenes shot inside the World Trade Center during the September 11, 2001 attacks were reportedly sold for US $ 45, 000.

Licensed Amateur Radio operators support most volunteer organizations, and are often affiliated with the American Radio Relay League ( ARRL ).