Astro chapter 2

During which of the following is the Earth tilted toward the sun in the upper (northern) hemisphere?

Summer solstice

Which of the following marks the shortest day (daylight) of the year?

Winter solstice

The angle measure upward from the horizon

Altitude

Where is the 0⁰ latitude on Earth?

Equator

Where is the 90⁰ latitude on Earth?

Both North and South Poles

Which of the following is a group of stars in the night sky?

Constellation

Which of the following is the angle measure from North in the horizontal direction?

Azimuth

Which of the following marks the longest day (daylight) of the year?

Summer solstice

Which of the following is the path that the sun takes in the sky?

Ecliptic

What is the actual cause of retrograde motion?

Inner planets move faster than outer planets

What is at the middle of a Geocentric system?

Earth

What is at the middle of a heliocentric system?

Sun

Zenith

Azimuth

Meridian

Declination

Horizon

Altitude

Latitude

Longitude

Angular size

Celestial sphere

celestial equator

Small-angle formula

a = 206,265” x d/D = 206,265” x object’s true size/object’s distance from us

Axial tilt or obliquity

The angle between a planet’s rotation axis and a line perpendicular to the planets orbital plane.

Circumpolar constellation

A constellation that, from the viewers perspective, never rises or sets. They are visible all year long because they are located close to the celestial pole.