What is the primary purpose of modern astronomy's 88 recognized constellations?

• To preserve ancient mythological stories
• To create a standardized system for mapping the night sky
• To measure star temperatures
• To calculate stellar distances

Why are some constellations not visible throughout the entire year?

• They only exist during certain seasons
• Light pollution blocks their visibility
• Earth's revolution around the Sun affects their visibility
• They are too dim to see consistently

What defines a circumpolar constellation?

• It appears only during winter months
• It never sets below the horizon as it circles a celestial pole
• It changes position monthly
• It only appears during summer months

Which statement about star magnitude is correct?

• Apparent magnitude is always greater than absolute magnitude
• Absolute magnitude measures how bright a star appears from Earth
• Apparent magnitude measures how bright a star looks from Earth
• Both magnitudes are always equal

How do astronomers measure the distance to stars?

• Using color spectrum analysis
• Measuring radio waves
• Using parallax measurements
• Counting light particles

What is a light-year?

• The time it takes starlight to reach Earth
• The distance light travels in one year
• The age of a star
• The brightness of a star

What does a blue-white star color indicate?

• The star is dying
• The star has a low temperature
• The star has a high temperature
• The star is similar to our Sun

According to the temperature table, approximately how hot is a white star?

• 3000 K
• 6000 K
• 10000 K
• 25000 K

Which star color indicates the coolest temperature?

• Blue
• White
• Orange
• Red

What instrument is used to analyze the elements in a star's atmosphere?

• Telescope
• Spectroscope
• Thermometer
• Parallax meter