# NASA Space Observation Quiz: Near Earth Objects!

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
A
Community Contributor
Quizzes Created: 810 | Total Attempts: 967,803
Questions: 10 | Attempts: 254

Settings

The National Aeronautics and Space Administration (NASA) is an independent agency of the United States Federal Government which is laddened with the responsibility of handling and exercising civilian space program as well as aeronautics and aerospace researches. It was formed on July 29, 1958, and has its headquarters in Washington, DC. This test is to ascertain your knowledge regarding the NEOs which have been observed over the years.

• 1.

### When was the message which suggested there was a chance 1997 XF11 could hit Earth in 2028 received?

• A.

1998

• B.

1997

• C.

1999

• D.

2000

A. 1998
Explanation
The message suggesting that there was a chance 1997 XF11 could hit Earth in 2028 was received in 1998.

Rate this question:

• 2.

### Based on orbit calculations of identified NEOs, the risk of future impact is assessed on how many scales?

• A.

3

• B.

2

• C.

5

• D.

4

B. 2
Explanation
The correct answer is 2. The risk of future impact is assessed on two scales based on orbit calculations of identified Near-Earth Objects (NEOs). These scales are the Torino Scale and the Palermo Technical Impact Hazard Scale. The Torino Scale is used to categorize the potential impact threat of NEOs on a scale from 0 to 10, while the Palermo Scale calculates the probability of a NEO impact based on its size and orbit.

Rate this question:

• 3.

### Spaceguard has been in existence since when?

• A.

1998

• B.

1997

• C.

1999

• D.

2000

A. 1998
Explanation
Spaceguard has been in existence since 1998.

Rate this question:

• 4.

### The initial US Congress mandate to NASA was to catalogue at least how many percent of NEOs which are at least 1 kilometer?

• A.

90%

• B.

95%

• C.

80%

• D.

100%

A. 90%
Explanation
The initial US Congress mandate to NASA was to catalogue at least 90% of NEOs (Near-Earth Objects) that are at least 1 kilometer in size. This means that NASA was required to identify and track a significant majority of these potentially hazardous objects in order to better understand and mitigate the risk they pose to Earth.

Rate this question:

• 5.

### There used to be how many planets?

• A.

10

• B.

9

• C.

8

• D.

7

B. 9
Explanation
The question is asking about the number of planets that used to exist. According to the traditional classification, there used to be nine planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. However, in 2006, the International Astronomical Union redefined the definition of a planet, and Pluto was reclassified as a "dwarf planet." Therefore, the correct answer is 9.

Rate this question:

• 6.

### Which of the following was decided by scientists to not be big enough?

• A.

Mercury

• B.

Pluto

• C.

Eros

• D.

Vesta

B. Pluto
Explanation
Pluto was decided by scientists to not be big enough. This is because in 2006, the International Astronomical Union (IAU) redefined the definition of a planet, and Pluto did not meet the new criteria. According to the new definition, a planet must orbit the Sun, be spherical in shape, and have cleared its orbit of other debris. Pluto failed to meet the third criterion as it shares its orbit with other objects in the Kuiper Belt. Therefore, scientists concluded that Pluto is not big enough to be considered a planet.

Rate this question:

• 7.

### How many known dwarf planets exist?

• A.

5

• B.

3

• C.

1

• D.

2

B. 3
Explanation
There are currently three known dwarf planets in our solar system. These dwarf planets are Pluto, Eris, and Haumea. They are similar to planets in that they orbit the Sun, but they are smaller in size and have not cleared their orbits of other debris. The classification of dwarf planets was introduced by the International Astronomical Union (IAU) in 2006.

Rate this question:

• 8.

### Halley's comet appears in how many years?

• A.

67

• B.

28

• C.

76

• D.

53

C. 76
Explanation
Halley's comet appears every 76 years. This is a well-known astronomical phenomenon that has been observed for centuries. The comet was first recorded by Edmund Halley in 1705, who predicted its return based on historical observations. Since then, it has been observed multiple times, with the most recent appearance in 1986. The next predicted appearance of Halley's comet is in 2061, which will be approximately 76 years after its previous appearance.

Rate this question:

• 9.

### Asteroids travel between the orbits of which of the following?

• A.

Jupiter and Pluto

• B.

Mercury and Saturn

• C.

Mars and Jupiter

• D.

Earth and Jupiter

C. Mars and Jupiter
Explanation
Asteroids travel between the orbits of Mars and Jupiter. This region is known as the asteroid belt, which is located between the innermost and outermost planets of our solar system. The gravitational pull from Jupiter prevents the asteroids from forming into a planet, causing them to remain scattered throughout this region.

Rate this question:

• 10.

### What's the diameter of Ceres?

• A.

880km

• B.

650km

• C.

950km

• D.

550km

C. 950km
Explanation
Ceres, the largest object in the asteroid belt between Mars and Jupiter, has a diameter of 950km. This measurement indicates the distance across the widest point of the celestial body.

Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

• Current Version
• Mar 21, 2023
Quiz Edited by
ProProfs Editorial Team
• Apr 26, 2019
Quiz Created by