Nov 2017 - What`s Out Tonight?
... too faint to see with the eyes because it shines at well liked for its blue & gold colors. Ptolemaeus magnitude +11. The second closest star visible to Alphonsus the naked eye is Sirius at 8.6 ly followed by Epsilon Moon (e) Eridani at 10.5 ly and Procyon at 11.4 ly. There Tycho Starting from New Mo ...
... too faint to see with the eyes because it shines at well liked for its blue & gold colors. Ptolemaeus magnitude +11. The second closest star visible to Alphonsus the naked eye is Sirius at 8.6 ly followed by Epsilon Moon (e) Eridani at 10.5 ly and Procyon at 11.4 ly. There Tycho Starting from New Mo ...
The power plant of the Sun and stars
... Visual binaries…you can see them as two stars in a telescope Like Albireo, Sirius, Nu Draconis Alpha Geminorum: Castor ...
... Visual binaries…you can see them as two stars in a telescope Like Albireo, Sirius, Nu Draconis Alpha Geminorum: Castor ...
Big Bear Valley Astronomical Society
... over the Bull, which was then placed in the heavens, but for his sacrilege the gods declared that the life of his best friend, Enkidu, should be taken as a forfeit. The chief star, Aldebaran is the 1st magnitude star referred to by Ptolemy as 'the Torch' on account of its bright, rose-colored lumin ...
... over the Bull, which was then placed in the heavens, but for his sacrilege the gods declared that the life of his best friend, Enkidu, should be taken as a forfeit. The chief star, Aldebaran is the 1st magnitude star referred to by Ptolemy as 'the Torch' on account of its bright, rose-colored lumin ...
The Hertzsprung-Russell Diagram
... • I: Supergiants • II: Bright giants • III: Giants • IV: Subgiants • V: Main-sequence stars – The full classification of a star includes both a spectral type and a luminosity class: • The Sun is a G2 V • Proxima Centauri is M5 V • Betelgeuse is M2 I • Sirius A: A1 V • Sirius B: DA2 V ...
... • I: Supergiants • II: Bright giants • III: Giants • IV: Subgiants • V: Main-sequence stars – The full classification of a star includes both a spectral type and a luminosity class: • The Sun is a G2 V • Proxima Centauri is M5 V • Betelgeuse is M2 I • Sirius A: A1 V • Sirius B: DA2 V ...
- National Optical Astronomy Observatory
... Figure 1: (X=color index (b-v), Y=Brightness (v)) According to the graph, the tip of the main sequence appears to lie around NGC 1496-1. This star’s color index is approximately 0.062, classifying it as a spectral type A star. Based on this observation, the age of the cluster is estimated to be no ...
... Figure 1: (X=color index (b-v), Y=Brightness (v)) According to the graph, the tip of the main sequence appears to lie around NGC 1496-1. This star’s color index is approximately 0.062, classifying it as a spectral type A star. Based on this observation, the age of the cluster is estimated to be no ...
Chapter 29: Stars - Mr. Pelton Science
... • What is the difference between brightness and luminosity? • What are the properties used to identify stars? ...
... • What is the difference between brightness and luminosity? • What are the properties used to identify stars? ...
Constellation Packet - Mr. Jenkins` Classroom
... around. The gods thought he would make an excellent guard. The gods gave him the duty of defending the garden of hesperides. Hercules lived far away and heard many stories of the garden of hesperides. He wanted to taste the juicy luscious fruit. The crisp red apples sounded especially good. When her ...
... around. The gods thought he would make an excellent guard. The gods gave him the duty of defending the garden of hesperides. Hercules lived far away and heard many stories of the garden of hesperides. He wanted to taste the juicy luscious fruit. The crisp red apples sounded especially good. When her ...
Spring Constellations
... Virgo, the virgin. Her head is right under Leo’s tail & she’s reclining on a couch. Only bright star is Spica which means “ear of wheat.” Spica is a white star (hot), about 220 LY away, & 2000X the sun’s brightness. A whole group of galaxies is to the left of Leo’s tail & above Virgo’s head. The Som ...
... Virgo, the virgin. Her head is right under Leo’s tail & she’s reclining on a couch. Only bright star is Spica which means “ear of wheat.” Spica is a white star (hot), about 220 LY away, & 2000X the sun’s brightness. A whole group of galaxies is to the left of Leo’s tail & above Virgo’s head. The Som ...
14.5 Yellow Giants and Pulsating Stars Variable Stars Not all stars
... stars. For example, ZZ Ceti stars, a kind of pulsating white dwarf with periods as short as a few minutes are found in the lower portion of the HR diagram. There are many stars like Mira (known as Mira variables) that have pulsation periods of about 1 year. These lie in the upper right of the HR d ...
... stars. For example, ZZ Ceti stars, a kind of pulsating white dwarf with periods as short as a few minutes are found in the lower portion of the HR diagram. There are many stars like Mira (known as Mira variables) that have pulsation periods of about 1 year. These lie in the upper right of the HR d ...
The Magnitude Scale
... how the magnitude scale works. The scale below is intended to be roughly visual; the human eye's (dark-adapted) detection efficiency peaks around 495 nanometers, while the formal photoelectric V peak (a filtered band intended to be close to visual) is around 550 nm; CCDs tend to peak around 700 nm. ...
... how the magnitude scale works. The scale below is intended to be roughly visual; the human eye's (dark-adapted) detection efficiency peaks around 495 nanometers, while the formal photoelectric V peak (a filtered band intended to be close to visual) is around 550 nm; CCDs tend to peak around 700 nm. ...
Stars
... The key to locating the North Star in the night sky is to first find the Big Dipper, a constellation of stars known as Ursa Major.. The Big Dipper is perhaps the best known group of stars in the northern sky and is easy to distinguish from all others. Also known as the Great Bear, the Big Dipper is ...
... The key to locating the North Star in the night sky is to first find the Big Dipper, a constellation of stars known as Ursa Major.. The Big Dipper is perhaps the best known group of stars in the northern sky and is easy to distinguish from all others. Also known as the Great Bear, the Big Dipper is ...
Spectroscopy, the Doppler Shift and Masses of Binary Stars
... The stars on the left are separated by 2.3 about 140 AU; those on the right by 2.6 . The two pairs are separated by about 208 (13,000 AU separation, 0.16 ly between the two pairs, all about 162 ly distant). Each pair would be about as bright as the quarter moon viewed from the other. ...
... The stars on the left are separated by 2.3 about 140 AU; those on the right by 2.6 . The two pairs are separated by about 208 (13,000 AU separation, 0.16 ly between the two pairs, all about 162 ly distant). Each pair would be about as bright as the quarter moon viewed from the other. ...
slides - Department of Physics and Astronomy
... What would be the color of the sky few thousand kilometers above the Earth. It is often said that stars twinkle but planets won’t. Do you agree? On hot summer days often you see the view closer to the surface of a paved road blurry and wavy. Why? Twinkling is not desirable for astronomical observati ...
... What would be the color of the sky few thousand kilometers above the Earth. It is often said that stars twinkle but planets won’t. Do you agree? On hot summer days often you see the view closer to the surface of a paved road blurry and wavy. Why? Twinkling is not desirable for astronomical observati ...
Basics – II. Time, Magnitudes and Spectral types
... For ordinary “civil” purposes, the year should: • contain an integer number of days and • stay in phase with the seasons As we have seen, the tropical year marks the recurrence of the seasons, but is close to 365.25 days long. The civil year can contain either 365 (ordinary year) or 366 days (leap y ...
... For ordinary “civil” purposes, the year should: • contain an integer number of days and • stay in phase with the seasons As we have seen, the tropical year marks the recurrence of the seasons, but is close to 365.25 days long. The civil year can contain either 365 (ordinary year) or 366 days (leap y ...
Order of Magnitude Icebreaker
... ★ Don’t discuss with other students (yet) ★ Use your physical intuition, not google! ★ Remember: Multiple approaches possible! ...
... ★ Don’t discuss with other students (yet) ★ Use your physical intuition, not google! ★ Remember: Multiple approaches possible! ...
Star Birth
... • Giant Molecular Clouds: In certain cold regions of interstellar space atoms combine to form molecules. – Molecular H is hard to detect, since they do not emit light (radiation) – However, carbon monoxide present in these clouds emit millimeter wavelength light, and thus can be detected by radio te ...
... • Giant Molecular Clouds: In certain cold regions of interstellar space atoms combine to form molecules. – Molecular H is hard to detect, since they do not emit light (radiation) – However, carbon monoxide present in these clouds emit millimeter wavelength light, and thus can be detected by radio te ...
Foundation 1 - Discovering Astronomy
... with pre-main-sequence stellar evolution. 2: Identify the defining characteristic of main-sequence stars and compare the relative lifetimes on the main sequence for stars of different mass. 3: List the names of nuclear fusion reactions and indicate the classes of stars in which each reaction is thou ...
... with pre-main-sequence stellar evolution. 2: Identify the defining characteristic of main-sequence stars and compare the relative lifetimes on the main sequence for stars of different mass. 3: List the names of nuclear fusion reactions and indicate the classes of stars in which each reaction is thou ...
May - Fort Worth Astronomical Society
... - 35 Sextans, which shows off a pair of orange and yellow stars, magnitudes 6.3 and 7.4 separated by 6.8" Deep Sky Objects NGC 3115 The star (so to speak) of this constellation is NGC 3115. At 21 MLy away, though it appears small at 4'x1', it's visible in binoculars. Named the Spindle Galaxy, it's h ...
... - 35 Sextans, which shows off a pair of orange and yellow stars, magnitudes 6.3 and 7.4 separated by 6.8" Deep Sky Objects NGC 3115 The star (so to speak) of this constellation is NGC 3115. At 21 MLy away, though it appears small at 4'x1', it's visible in binoculars. Named the Spindle Galaxy, it's h ...
A Brief guide to the night Skies for those who know nothing
... which revolves round a star and which does not emit light produced by internal nuclear reactions in the way that a star does. These planets move around the Sun in different ways. Instead of moving in perfect circles, they take an elliptical path, which means that they are all at differing distances ...
... which revolves round a star and which does not emit light produced by internal nuclear reactions in the way that a star does. These planets move around the Sun in different ways. Instead of moving in perfect circles, they take an elliptical path, which means that they are all at differing distances ...
A105 Stars and Galaxies
... The hot, dense, bare core is exposed! Surface temperatures as hot as 100,000 degrees The hot core heats the expelled gas and makes it glow ...
... The hot, dense, bare core is exposed! Surface temperatures as hot as 100,000 degrees The hot core heats the expelled gas and makes it glow ...
Star formation and lifetimes
... 1. The gases inside the Sun are burning and producing large amounts of energy. 2. Hydrogen is combined into helium, giving off large amounts of energy. 3. Gas inside the Sun heats up when compressed, giving off large amounts of energy. 4. Heat trapped by magnetic fields in the Sun is released as ...
... 1. The gases inside the Sun are burning and producing large amounts of energy. 2. Hydrogen is combined into helium, giving off large amounts of energy. 3. Gas inside the Sun heats up when compressed, giving off large amounts of energy. 4. Heat trapped by magnetic fields in the Sun is released as ...
Last Year`s Exam, Section B
... Orionis C are always found in or near star formation regions, whereas less bright main-sequence stars like the Sun can be found anywhere. Brighter main-sequence stars are more massive. Luminosity increases much faster than mass: a star 10 times as massive is 10000 times as luminous. Therefore ...
... Orionis C are always found in or near star formation regions, whereas less bright main-sequence stars like the Sun can be found anywhere. Brighter main-sequence stars are more massive. Luminosity increases much faster than mass: a star 10 times as massive is 10000 times as luminous. Therefore ...
Unit 3 - Section 8.9 Life of Stars
... Some star are bright. Some stars are faint. Some star are white some stars, while some are coloured. Why? Seeing Light -The human eye can detect light in the form of radiation (energy). Other forms of electromagnetic radiation are radio waves and x-rays. Waves with different wavelengths make up the ...
... Some star are bright. Some stars are faint. Some star are white some stars, while some are coloured. Why? Seeing Light -The human eye can detect light in the form of radiation (energy). Other forms of electromagnetic radiation are radio waves and x-rays. Waves with different wavelengths make up the ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.