'Sidereal year' presentation slideshows

The Beginnings of Modern Astronomy

The Beginnings of Modern Astronomy. Copernicus to Kepler. This logo denotes A102 appropriate. Trouble in Vatican City. The calendar was still a mess Three ways to describe a year: Julian calendar year = 365.25 days Civil time Sidereal year = 365.256366 days

847 views • 60 slides

Chapter S1 Celestial Timekeeping and Navigation

Chapter S1 Celestial Timekeeping and Navigation. S1.1 Astronomical Time Periods. Our goals for learning:. How do we define the day, month, year, and planetary time periods? How do we tell the time of day? When and how do we have leap years?.

858 views • 59 slides

Astronomy 100 Tuesday, Thursday 2:30 - 3:45 pm Tom Burbine tburbine@mtholyoke

Astronomy 100 Tuesday, Thursday 2:30 - 3:45 pm Tom Burbine tburbine@mtholyoke.edu. Homework #4. Its on OWL. The first homework assignment has 10 questions. For each question, you will get two attempts to answer it correctly. After your last attempt, the correct answer will be shown.

413 views • 40 slides

Stars seem to be on the inner surface of a sphere surrounding the Earth .

Celestial Sphere. Stars seem to be on the inner surface of a sphere surrounding the Earth . Celestial Sphere. Stars that appear close in the sky may not actually be close in space. Celestial Sphere.

618 views • 39 slides

Earth-rise on Moon

385 views • 37 slides

Celestial Coordinate Systems

Celestial Coordinate Systems. Horizon Coordinates. h - altitude: +-90 deg A - azimuth (0-360 deg, from N through E, on the horizon) z - zenith distance; 90 deg - h (refraction, airmass). Kaler. Equatorial Coordinates. RA: 0 - 24 h (increases eastward from the Vernal Equinox)

557 views • 28 slides

Outline

485 views • 24 slides

Outline

499 views • 24 slides

The Universe within 500 million light years of Earth (in the center)

The Universe within 500 million light years of Earth (in the center). A light year is a unit of distance It is the distance that light can travel in one sidereal year Light moves at a velocity of about 300,000 kilometers each second

319 views • 10 slides