Modern Astronomy

Organized by the Faculty of Science, HKU

Credit: ESO/J. Emerson/VISTA

Modern Astronomy

Venue: G15, Chong Yuet Ming Physics Building

Instructor:Cheung Sze Leung (cheung.szeleung@hku.hk)

Guest Lecturers: Prof K S Cheng, Dr Jason Pun, Dr MH Lee, Dr Jeremy Lim, Dr Steven Ng

Tentative schedule:

#1 Jul 23 (Tue) 4-9pm Introduction to Astronomy#2 Jul 26 (Fri) 4-9pm Solar Observation, use of telescopes#3 Jul 30 (Tue) 4-9pm Use of astronomical archive#4 Aug 2 (Fri) TBC Stellar evolution, Remote Observation#5 Aug 6 (Tue) TBC Remote Observation, Principals of imaging, photometry#6 Aug 9 (Fri) TBC Remote Observation, The Moon#7 Aug 13 (Tue) TBC Presentation #8 Aug 16 (Fri) 6-11pm Outing [backup date Aug 20]

Please bring along with your camera for all lessons

Outing - Astro Park

Date: Aug 16 (Friday)Leave astropark at 11pm

Free transportation is providedIf weather is bad, the outing will be postponed

Expectation

• Understand how modern astronomy works• Able to operate a telescope (which is fun)• Scientific Reasoning (which is the hardest)

Assessment1) Observation log (during class) record what you have observed2) Group Presentation (the 2nd last lesson)

https://www.facebook.com/groups/341442492654753/

The University of Hong KongJunior Science Institute

Astronomy WorkshopCheung, Sze LeungFaculty of Science

Credit: Cheung Sze Leung

Credit: Watanabe Tsuyoshi

Credit: KAGAYA

The Temple of Hathor, Dendera

Credit: Akira Fujii

1990-09-03 1990-09-23

1990-10-23 1991-01-06Wanderers

400 Years ago….

伽利略Galileo(1564-1642)

Mount Wilson 100-inch telescope

Edwin Hubble at the 100-inch telescope at Mt. Wilson

The Huntington Library, San Marino, California

Credit: www.starizona.com

視網膜

視神經

透鏡

桿狀細胞

桿狀細胞

錐狀細胞

The fundamental instrument – our eyes

Photographic Plates

Credit: ESO

Accelerating Universe First image of an exoplanet Stars orbiting the Milky Way black hole The gamma-ray burst–supernova connection The motion of stars in the Milky Way

Oldest star known in the Milky Way Merging neutron star—gamma-ray burst connection Cosmic temperature independently measured Most distant object measured Lightest exoplanet found

Orion 獵戶座

α

β

γ

δε

ζ

η

κ

λ

ι

Betelgeuse

Rigel

Bellatrix

Meissa

Alnilam

Alnitak

Mintaka

Saiph

Hatsya

Saif al Jabbar

參宿一參宿二參宿三

參宿四

參宿五

參宿六 參宿七

伐三

觜宿一

參宿增三

獵戶座 參宿

大犬座 天狼、野雞、軍市、弧矢

每 5個星等 ,

亮度相差 100倍

Credit: Sky & Telescope

目視星等 絕對星等

赤經

赤緯

1 degree = 60 arc minute

1 arc minute = 60 arc second

Credit: HKU

The Andromeda constellation, from a medieval Islamic copy "Liber locis stellarum fixarum" by the 10th century Persian astronomer Abd al-Rahman al-Sufi. The drawing shows the Andromeda Nebula.

Fuzziness in the sky

• Persian astronomers recorded a misty patch in the Andromeda constellation on their star maps in 10th century.

梅西爾 Charles Messier (1730 - 1817)The Comet Hunter

Deep Sky Objects

Galaxy 星系 Globular cluster 球狀星團

Open cluster 疏散星團 Nebula 星雲

Vela Supernova Remnant

Credit: Robert Gendler

The Giant Molecular Cloud in the constellation Orion

Credit: Rogelio Bernal Andreo

M42 - Great Orion Nebulaa massive active star formation region

The giant bubble of Barnard's Loop is thought to be the blast wave from a star that blew up inside the region about two million years ago.

The death of a star two million years ago triggered the formation of a new generation of stars

Planck image (ESA), Nature vol 466, page 928–929

Spitzer image SSC2006-16bNASA/JPL-Caltech/T. Megeath (University of Toledo, Ohio)