eredeti ár:
A termék ára Líra Könyv Zrt.-nél, ami nem tartalmaz online kedvezményt.
2350 Ft
online ár:
Webáruházunkban a termékek mellett feltüntetett fekete színű online ár csak internetes megrendelés esetén érvényes. Amennyiben a Líra bolthálózatunk valamelyikében kívánja megvásárolni a terméket, akkor az adott boltban lévő ár az irányadó.
ár a könyvön:
Az eredeti ár (könyvre nyomtatott ár), a kiadó által ajánlott fogyasztói ár, amely megegyezik a bolti árral (bolti akció esetét kivéve).
5490 Ft
online ár:
Webáruházunkban a termékek mellett feltüntetett fekete színű online ár csak internetes megrendelés esetén érvényes. Amennyiben a Líra bolthálózatunk valamelyikében kívánja megvásárolni a terméket, abban az esetben az eredeti ár (könyvre nyomtatott ár) az érvényes, kivétel ez alól a boltban akciós könyvek.
eredeti ár:
A termék ára Líra Könyv Zrt.-nél, ami nem tartalmaz online kedvezményt.
2350 Ft
online ár:
Webáruházunkban a termékek mellett feltüntetett fekete színű online ár csak internetes megrendelés esetén érvényes. Amennyiben a Líra bolthálózatunk valamelyikében kívánja megvásárolni a terméket, akkor az adott boltban lévő ár az irányadó.
eredeti ár:
A termék ára Líra Könyv Zrt.-nél, ami nem tartalmaz online kedvezményt.
2350 Ft
online ár:
Webáruházunkban a termékek mellett feltüntetett fekete színű online ár csak internetes megrendelés esetén érvényes. Amennyiben a Líra bolthálózatunk valamelyikében kívánja megvásárolni a terméket, akkor az adott boltban lévő ár az irányadó.
eredeti ár:
A termék ára Líra Könyv Zrt.-nél, ami nem tartalmaz online kedvezményt.
811 Ft
online ár:
Webáruházunkban a termékek mellett feltüntetett fekete színű online ár csak internetes megrendelés esetén érvényes. Amennyiben a Líra bolthálózatunk valamelyikében kívánja megvásárolni a terméket, akkor az adott boltban lévő ár az irányadó.
ár a könyvön:
Az eredeti ár (könyvre nyomtatott ár), a kiadó által ajánlott fogyasztói ár, amely megegyezik a bolti árral (bolti akció esetét kivéve).
5890 Ft
online ár:
Webáruházunkban a termékek mellett feltüntetett fekete színű online ár csak internetes megrendelés esetén érvényes. Amennyiben a Líra bolthálózatunk valamelyikében kívánja megvásárolni a terméket, abban az esetben az eredeti ár (könyvre nyomtatott ár) az érvényes, kivétel ez alól a boltban akciós könyvek.
eredeti ár:
A termék ára Líra Könyv Zrt.-nél, ami nem tartalmaz online kedvezményt.
1499 Ft
online ár:
Webáruházunkban a termékek mellett feltüntetett fekete színű online ár csak internetes megrendelés esetén érvényes. Amennyiben a Líra bolthálózatunk valamelyikében kívánja megvásárolni a terméket, akkor az adott boltban lévő ár az irányadó.
focal pointGleanings from the GlassIn the optical shop ofAdler Planetarium, Richard Fisherlearned valuable lessons about telescopes and life.Somewhere in the library of a Chicago public school is a well-worn book bound in green cloth. My name might be the only one on the dog-eared card tucked...
focal pointSky Writingmentioned in the column. Her friends were always amazed when she could then point out details of the night sky to them!I believe the general public is eager for good, easy-to-read astronomy columns. There's too much astrology in print, along with too many stories about...
spectrumSituational Awarenesschuckle whenever I'm with someone who notices the Moon up in broad daylight for the first time. The reaction is invariably a mix of surprise and alarm: "What the ? Something's wrong! How can the Moon be up during the day?!" It's not really funny, though it's sad....
JIBack to SchoolIt's that time of year when students will (we hope) put down their videogame controllers, pick up their pencils (or laptop computers!), and return to classrooms ready to learn. Teachers will return to those same classrooms ready to teach. But what should they teach? What should...
Best of the Bestlove to make lists, especially of extremes. I have enormous fun with a pair of talks I give: the 10 greatest discoveries in astronomy and the 10 greatest unanswered questions. Of course, such lists are subjective and can never be completely accurate. But that's why they're so much...
LJspectrumCalling All SuperstarsI was struck by some commentaries that preceded John Glenn's recent flight that astronauts had become nameless and faceless in the purview of U.S. society. That observation seems to me to be spot on. Tonight I could easily recall the Mercury gang and those on Apollo...
The Hipparcos FirehoseDuring my first visit to Mount Wilson Observatory, in the late '50s, solar observer Tommy Cragg took me to its library. I remember being blovin away; this kid had never dreamed that so many astronomy books existed!One huge set was labeled "AGK2," and this cryptonym piqued my...
focal pointA Trail to the SkyChristopher Cokinos tries "starpacking" in the Montana wilderness.Some would scoff at hiking just zk miles from ourtrailhead to a tiny Forest Service workstation in Montana's West Pioneer Mountains. But our backpacks were stuffed with a week's worth of food and clothes,...
SpectrumBy the Light of the MoonIn early autumn, as the workday ends, this New Englander begins to twitch when he knows that northerly winds will blow across the face of a nearly full Moon. My anticipation grows as I quickly eat dinner and set up my little spotting scope. Now I'm ready for...
'?ilSSpectrum"Godspeed, John Glenn!"Back into space tie goes this October quintessential American hero 36 years after he rode the Friendship 7 Mercury capsule thrice around the Earth.John Herschel Glenn was the second to make such a trip; he followed the Soviet Union's Yuri Gagarin by 10 months....
SpectrumA Death in the FamilyI once asked a visiting Soviet astronomer about tlie fortunes of a Dr. X, his countryman who I'd met in Prague years before. I described him as wonderfully bright and ambitious, and wondered why he'd dropped out of sight. The deadpan answer was, "Perhaps he was too...
Spectrum littr^Amateurs Have ResponsibilitesJOHNNY HORNEA year has passed since the Heaven's Gate mass suicide. The initial hysteria, hand-wringing, and finger-pointing is past, so I think this is a good time to reflect on that insanity. I'm still depressed that an amateur astronomer indirectly...
spectrumWmAshes to Ashes A quarter century ago I came to know Gene Shoemaker at a tiny, private meeting at the famous Hotel Pierre in New York City.Sagan was there, Asimov too the coolest guest list I'll ever make up! We had gathered to explore a new way to spark science education in a failing...
Research-oriented amateurs have always had one big edge over professionals time, gobs of it. They can undertake long-duration programs (constantly monitoring a "constant" star) or programs with a high risk of failure (searching for lunar transient phenomena). Professionals with such ideas find a...
spectrumTime Warp-Itl-ÍT'íbaAs my PLANE TOUCHES DOWN AT ISTANBUL'S AtaTORK AiRPORT, I'm struck by the curious world some of us live in. No, it's not a i cultural thing, nor religious, nor political. For people with agendas that stretch far into the future, it's a world of curious time ...
Spectrum"Things Fail Apart"bi'fiiiThat's the title of the first novel by my favorite African writer, Chinua Acliebe. Okonkwo, a tribal headman, is disinherited by whites and commits suicide. It's a simple plot.I couldn't help but reflect on this novel as 1 read a recent story by Tony Ortega in...
SpectrumSuch a Deal!One of the neat things about working at ST is that no day ever unfolds as you expect. A conversation with a surprise visitor, for example, can cause new thinking. That's what happened during Christian Nitschelm's visit last July.I first met this astronomer/high-school teacher...
April 1963 10,000th pageSpectrum50,000 Pages and CountingThanks to the staggering arithmetic skills of last summer's editorial intern. Will Dane, we know that this is ST's 50,000th published page. It's a trivial milestone, really, but it gives me another excuse to pontificate.As you learned in the...
LJspectrumHigh-Grading the Oref you go online and access NASA's Astrophysics Data System (http: //adswww.harvard.edu/), you can get abundant snapshots of what's happening in astronomical research. In the database for 1997, for example, there are 19,525 citations, "a pretty good approximation of the...