Astr 102 - Study guides, Class notes & Summaries

Luminosity - The total amount of power a star emits into space that's measured in watts. Apparent Brightness - Amount of starlight that actually reaches Earth HR Diagram - is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature and evolutionary stage. Stars in the stable phase of hydrogen burning lie along the Main Sequence according to their mass. OBAFGKM - Oh Be A Fine Girl Kiss Me Main Sequence - the vast majorit...

Plants and animals are - two small branches of the diverse "tree of life" on Earth. How did oxygen (O2) get into Earth's atmosphere? - It was released by life through the process of photosynthesis Based on DNA studies, it seems that all life on Earth - shares a common ancestor According to fossil evidence how far back in time did life on Earth exist? - about 3.5 billion years or more Which of the following best describes the predominant scientific view of the origin of life on Earth? - ...

A star has an apparent brightness of -2 and an absolute brightness of 1. What must be true? Select one: a. The star is further than 10 parsecs b. The star is at 10 parsecs c. The star is closer than 10 parsecs d. The star is close to exploding - c What is special about electromagnetic waves? Select one: a. We can see all of them b. They do not need a medium to travel c. They only exist near stars d. Each color travels at a different speed - b A star that has a smaller absolute bright...

We have learned that the centre of the milky way contains a very massive black hole. We developed this understanding by: - Monitoring the orbital motions of many individual stars in the very central parts of the Milky Way If the sun were to be squashed down small enough to become a black hole, then: - The planets in the solar system would orbit the Sun in unchanged fashion (but would receive no light from it) The first stellar mass black hole identified, Cygnus X-1, was found in 1973. The n...

ASTR 102 Final Lecture Questions | 100% Correct Answers | Verified | Latest 2024 Version Q1.1: If every star in the universe was a grain ofsand, which of the following would be filled ~4meters deep in sand? A. This classroomB. Cal Poly campusC. SLO countryD. CaliforniaE. Continental US - SLO Q3.2: If you walk out of this building and face directly south, which direction is east? A. Slightly to the rightB. Slightly to the leftC. Directly rightD. Directly leftE. Behind you - D Q4.1...

Human technology seems on the verge of providing something on earth that the stars use all the time: thermonuclear reactions. This would give us a virtually inexhaustible supply of energy, but we face one particularly difficult problem namely: - we need to contain the hot hydrogen somehow. Since it has to be a temperature of several million degrees, ordinary material containers will not do it When we speak of the 'uniform' expansion of the universe - the behaviour is best understood as a ...

ASTR 1020 FINAL EXAM NEWEST ACTUAL EXAM COMPLETE ALL 150 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+

order of red giant's life - Red Giant → Planetary Nebula → White Dwarf → Black Dwarf or Red Giant → Type II Supernova → Neutron Star or Red Giant → Type II Supernova → Black Hol The eventual fate of our Sun is to - become a steadily cooling white dwarf.

Quiz Not good place to build Observatory? - Australia (because of fire disaster) Best Location for an Observatory - 1. Big Island of Hawaii 2. Andes Mtn Chile 3. San Diego Dots - Stars in our galaxies blobs - Typically galaxies, 10% could be dead stars Light - Acts as 1. Weight 2. A Particle