Exoplanet Discovery

Description: Test your knowledge about the fascinating world of exoplanet discovery, the search for planets beyond our solar system.
Number of Questions: 15
Created by:
Tags: exoplanets astronomy space exploration
Attempted 0/15 Correct 0 Score 0

What is the primary method used to detect exoplanets?

  1. Direct Imaging

  2. Transit Photometry

  3. Microlensing

  4. Radial Velocity


Correct Option: B
Explanation:

Transit photometry involves observing a star's brightness as an exoplanet passes in front of it, causing a slight dimming.

Which space telescope is renowned for its groundbreaking exoplanet discoveries?

  1. Hubble Space Telescope

  2. Chandra X-ray Observatory

  3. Kepler Space Telescope

  4. James Webb Space Telescope


Correct Option: C
Explanation:

The Kepler Space Telescope was specifically designed to search for exoplanets using the transit photometry method.

What is the term used to describe the habitable zone around a star where liquid water can exist on the surface of a planet?

  1. Goldilocks Zone

  2. Ecosphere

  3. Circumstellar Habitable Zone

  4. Biosphere


Correct Option: C
Explanation:

The circumstellar habitable zone is the region around a star where conditions are suitable for liquid water to exist on a planet's surface.

Which exoplanet was the first to be confirmed orbiting a Sun-like star?

  1. 51 Pegasi b

  2. HD 209458 b

  3. Gliese 876 b

  4. Tau Ceti e


Correct Option: A
Explanation:

51 Pegasi b, discovered in 1995, was the first exoplanet confirmed to orbit a Sun-like star.

What is the name of the exoplanet that is tidally locked to its host star, resulting in one side always facing the star and the other side always facing away?

  1. Kepler-452b

  2. TRAPPIST-1e

  3. Proxima Centauri b

  4. HD 189733 b


Correct Option: D
Explanation:

HD 189733 b is tidally locked to its host star, causing one side to be extremely hot and the other side to be extremely cold.

Which exoplanet system is known for having seven Earth-sized planets orbiting a single star?

  1. TRAPPIST-1

  2. Kepler-452

  3. Gliese 667C

  4. HD 10180


Correct Option: A
Explanation:

The TRAPPIST-1 system is home to seven Earth-sized planets orbiting a single star, making it a prime target for studying the potential for life beyond Earth.

What is the term used to describe the variation in a star's brightness caused by the gravitational tug of an orbiting exoplanet?

  1. Radial Velocity

  2. Transit Photometry

  3. Microlensing

  4. Astrometry


Correct Option: A
Explanation:

Radial velocity involves measuring the slight changes in a star's motion caused by the gravitational pull of an orbiting exoplanet.

Which exoplanet was the first to be discovered using the microlensing technique?

  1. OGLE-2003-BLG-235Lb

  2. HD 209458 b

  3. 51 Pegasi b

  4. Gliese 876 b


Correct Option: A
Explanation:

OGLE-2003-BLG-235Lb was the first exoplanet discovered using the microlensing technique, which involves observing the gravitational lensing effect of a massive object on the light from a background star.

What is the name of the exoplanet that is known for its extremely high surface temperature, making it one of the hottest planets discovered?

  1. KELT-9b

  2. WASP-12b

  3. HD 189733 b

  4. 51 Pegasi b


Correct Option: A
Explanation:

KELT-9b is an extremely hot exoplanet with a surface temperature of over 4,000 degrees Celsius, making it one of the hottest planets known.

Which exoplanet system is known for having multiple planets that are potentially habitable?

  1. Kepler-452

  2. TRAPPIST-1

  3. Gliese 581

  4. HD 85512


Correct Option: B
Explanation:

The TRAPPIST-1 system contains multiple planets that are potentially habitable, with some of them located in the circumstellar habitable zone.

What is the term used to describe the method of detecting exoplanets by observing the slight wobble of a star caused by the gravitational pull of an orbiting planet?

  1. Radial Velocity

  2. Transit Photometry

  3. Microlensing

  4. Astrometry


Correct Option: A
Explanation:

Radial velocity involves measuring the slight changes in a star's motion caused by the gravitational pull of an orbiting exoplanet.

Which exoplanet was the first to be discovered orbiting a pulsar?

  1. PSR B1257+12 b

  2. HD 209458 b

  3. 51 Pegasi b

  4. Gliese 876 b


Correct Option: A
Explanation:

PSR B1257+12 b was the first exoplanet discovered orbiting a pulsar, a rapidly rotating neutron star.

What is the name of the exoplanet that is known for its extremely long orbital period, taking over 10,000 years to complete one orbit around its host star?

  1. HD 100546 b

  2. GJ 876 b

  3. 51 Pegasi b

  4. Kepler-452b


Correct Option: A
Explanation:

HD 100546 b is an exoplanet with an extremely long orbital period of over 10,000 years, making it one of the longest-period exoplanets known.

Which exoplanet system is known for having a planet that is tidally locked to its host star, resulting in one side always facing the star and the other side always facing away?

  1. Kepler-452

  2. TRAPPIST-1

  3. Gliese 876

  4. HD 189733


Correct Option: D
Explanation:

The HD 189733 system contains a planet that is tidally locked to its host star, causing one side to be extremely hot and the other side to be extremely cold.

What is the term used to describe the method of detecting exoplanets by observing the slight dimming of a star's brightness as an exoplanet passes in front of it?

  1. Radial Velocity

  2. Transit Photometry

  3. Microlensing

  4. Astrometry


Correct Option: B
Explanation:

Transit photometry involves observing a star's brightness as an exoplanet passes in front of it, causing a slight dimming.

- Hide questions